Код ошибки 0 800706ва

Симптомы

Когда клиентский компьютер под управлением Microsoft Windows XP делает запрос к удаленному объекту Microsoft COM +, может произойти сбой запроса. Кроме того код ошибки 0x800706BA может быть создан.

Примечание. Код ошибки 0x800706BA указывает, что сервер удаленного вызова (RPC) недоступен.

Причина

Эта проблема возникает, когда клиентский компьютер под управлением Windows XP освобождает удаленного объекта COM +. Примерно 20 секунд до 30 секунд после на клиентском компьютере удаленный объект COM +, были использованы DCOM на сервере RPC-порты будут закрыты. Если сеть отключена, сразу же после на клиентском компьютере удаленный объект COM +, RPC-порты, используемые службой DCOM на сервере остаются открытыми в течение нескольких часов. Это может привести к порту нехватки. Сбой будущих запросов удаленного объекта COM + с клиентского компьютера.

Решение

Сведения об исправлении

Существует исправление от корпорации Майкрософт. Однако данное исправление предназначено для устранения только проблемы, описанной в этой статье. Применяйте данное исправление только в тех системах, которые имеют данную проблему. Это исправление может проходить дополнительное тестирование. Таким образом если вы не подвержены серьезно этой проблеме, рекомендуется дождаться следующего пакета обновления, содержащего это исправление.

Если исправление доступно для скачивания, имеется раздел «Пакет исправлений доступен для скачивания» в верхней части этой статьи базы знаний. Если этот раздел не отображается, обратитесь в службу поддержки для получения исправления.

Примечание. Если наблюдаются другие проблемы или необходимо устранить неполадки, вам может понадобиться создать отдельный запрос на обслуживание. Стандартная оплата за поддержку будет взиматься только за дополнительные вопросы и проблемы, которые не соответствуют требованиям конкретного исправления. Полный список телефонов поддержки и обслуживания клиентов корпорации Майкрософт или создать отдельный запрос на обслуживание посетите следующий веб-узел корпорации Майкрософт:

http://support.microsoft.com/contactus/?ws=supportПримечание. В форме «Пакет исправлений доступен для скачивания» отображаются языки, для которых доступно исправление. Если нужный язык не отображается, значит исправление для данного языка отсутствует.

Предварительные условия

Необходимо иметь Windows XP для установки этого исправления.

Сведения о перезагрузке компьютера

После установки исправления компьютер необходимо перезагрузить.

Сведения о реестре

Необходимо создать разделы реестра для активизации этого исправления. Кроме того изменения в системный реестр для активизации этого исправления нет.

Сведения о файлах

Английская версия данного исправления содержит атрибуты файла (или более поздние атрибуты файлов), приведенные в следующей таблице. Дата и время для этих файлов указаны в формате общего скоординированного времени (UTC). При просмотре сведений о файле, он преобразуется в локальное время. Чтобы узнать разницу между временем по Гринвичу и местным временем, откройте вкладку Часовой пояс элемента Дата и время в панели управления.

Имя файла	Версия файла	Размер файла	Дата	Время
Ole32.dll	5.1.2600.3124	1,287,168	23-Apr-2007	14:20
Rpcss.dll	5.1.2600.3124	399,360	23-Apr-2007	14:20
Updspapi.dll	6.2.29.0	371,424	19-Jan-2006	19:29

Статус

Корпорация Майкрософт подтверждает, что это является ошибкой в продуктах Майкрософт, перечисленных в разделе «Относится к».

Дополнительные сведения

Для получения дополнительных сведений щелкните следующий номер статьи базы знаний Майкрософт:

Описание 824684 Стандартные термины, используемые при описании обновлений программных продуктов Майкрософт

Using a dedicated repair tool fixes this update error quickly

by Ivan Jenic

Passionate about all elements related to Windows and combined with his innate curiosity, Ivan has delved deep into understanding this operating system, with a specialization in drivers and… read more

Updated on June 16, 2023

Windows 10 and 11 are frequently updated like the earlier versions of the Windows operating systems. These are primarily security patches to protect your PC against current threats.

Hence, it is essential to install these updates when they are available. However, users keep getting different errors, like the update error 0x800f081f, while trying to install these latest updates.

Another prominent issue preventing users from installing updates is the error code 0x800706ba. Thankfully, we have provided the fix for this issue in this guide, just like we have done for the earlier problems.

What does 0x800706BA mean?

The leading cause of the Windows update error 0x800706BA is broken system files. This can be fixed with the built-in repair tools on your PC. You can also repair the system files with a dedicated tool.

Also, the issue can be down to glitches with the update process. You can rectify this by running the Windows Update troubleshooter.

Users have faced different variations of this error including

• Error 0x800706ba the RPC server is unavailable
• 0x800706ba windows 7
• Result failure error code 0x800706ba
• SCCM 0x800706ba

Regardless of the variations, the solutions we suggest will come in handy in resolving the problem.

How can I fix error 0x800706ba on Windows?

In this article

• What does 0x800706BA mean?
• How can I fix error 0x800706ba on Windows?
• 1. Run SFC and DISM
• 2. Use Windows Update Troubleshooter
• 3. Enable Critical Windows Update Services
• 4. Download the update manually
• 5. Reset Windows Updates Components
• What does RPC Server unavailable mean?
• How can I fix the 0x800706ba error on Windows 11?

1. Run SFC and DISM

1. Press Windows key + Q and type cmd.
2. Choose the Run as administrator option next to Command Prompt.
   
3. Copy and paste the command below and hit Enter: sfc /scannow
   
4. Wait until the scan and repair process is finished.

Windows 10 error 0x800706ba is primarily caused by corrupted system files. Fortunately, you can use one of the Windows built-in tools, like System File Checker (SFC), to correct the situation.

If the SFC scan does not work, you can use the Deployment Image Servicing and Management (DISM)tool to fix corrupt system files, as shown below:

1. Open Command Prompt as admin.
2. Copy and paste the following command into the command line and hit Enter: dism.exe /Online /Cleanup-image /Restorehealth
   
3. If the DISM can’t obtain files online, try using your USB or DVD installation. Insert media and type the following command: dism.exe /Online /Cleanup-Image /RestoreHealth /Source: C:/RepairSourceWindows /LimitAccess
   
4. Be sure to replace the C:/RepairSourceWindows with the path of your DVD or USB.

Note: Make sure to replace the repair source path with your own.

Finally, instead of worrying about other system errors, you can use a dedicated tool to fix these corrupt and broken files.

2. Use Windows Update Troubleshooter

1. Press the Windows key + I to launch the Settings app.
2. Select the Updates & Security option.
   
3. Select Troubleshoot in the left pane.
   
4. Click the Additional troubleshooters option.
   
5. Choose the Windows Update option.
   
6. Click the Run the troubleshooter option.
   
7. Finally, follow the onscreen instruction to complete the process.

Windows Update Troubleshooter is a Windows 10 built-in tool that can also be used to fix this problem since error 0x800706ba is associated with Windows updates.

3. Enable Critical Windows Update Services

1. Press the Windows key + R to launch the Run utility.
2. Type services.msc in the run box and click OK.
   
3. Double-click the Background Intelligent Transfer service.
   
4. Click the dropdown before Startup type and select Automatic.
   
5. Now, click the Start button followed by OK.
   
6. Finally, go back to the Services window and repeat Steps 4 and 5 for the Windows Update and Workstation services.
   

There are essential Windows Update services that ensure that updates and patches are securely downloaded and installed without issues.

Some vital Windows Updates services include Windows Update, Workstation, and Background Intelligent Transfer service. However, when these services are disabled, the Windows 10 error 0x800706ba problem might occur.

4. Download the update manually

1. Go to the Microsoft Update Catalog website.
2. In the search box, enter the update code and then hit the Enter key.
3. From the list of matching updates, locate the update that uses the same architecture as your system.
4. Click the Download button next to the update to download it.
5. Once you download the update, run the setup file and follow the installations.
6. After the update is complete, restart your Windows PC.

Another workaround to help you fix the error 0x800706ba is downloading the update directly from Microsoft’s Update Catalog. Though, you need to identify the update code of the problematic update before you can advance.

Typically, every Windows update code starts with KB, followed by an arrangement of numbers. After identifying the update code, you can proceed to download and install the update manually.

Read more about this topic

• Full Fix: Windows Update Service not running
• Fix: There were some problems installing updates
• Fix error code 0x800706be & install Windows updates smoothly
• How to use the Windows Update troubleshooter in Windows 10 & 11

5. Reset Windows Updates Components

1. Press the Windows key + X and select Command Prompt (Admin).
   
2. Once the Command Prompt opens, run the following commands: net stop wuauserv net stop cryptSvc net stop bits net stop msiserver Ren C:WindowsSoftwareDistribution SoftwareDistribution.old Ren C:WindowsSystem32catroot2 Catroot2.old net start wuauserv net start cryptSvc net start bits net start msiserver
3. After running these commands, check to see if the problem is resolved.

Lastly, you can resolve the Windows 10 error 0x800706ba problem by manually resetting Windows Updates components. Alternatively, you can create a reset script using the steps outlined in our WUReset script guide.

What does RPC Server unavailable mean?

It is the RPC Server. When a Windows PC is unable to connect to other networks’ devices, an unavailable error message appears. Your firewall settings may not be correct, or third-party software might be interfering.

Using the solutions above will come in handy to fix this error.

How can I fix the 0x800706ba error on Windows 11?

1. Press the Windows key + R, type gpedit.msc, and hit Enter.
   
2. Select the Administrative Templates option in the left pane.
   
3. Double-click the Windows components option to open it.
   
4. Select Windows Update.
   
5. Now, double-click the Configure Automatic Updates option.
   
6. Finally, tick the radio button for the Not Configured option and click OK.
   

With the steps above, you should be able to use the GPO local editor to fix the 0x800706BA error. Also, you can use the other five solutions in this guide to resolve the issue.

If you want to fix Windows Update error 0x800706be on Windows 11, you should know that the solutions are almost identical to the ones for Windows 10.

Similar to update error 0x80070422, the issue is most likely caused by file corruption, so repairing your system might be necessary.

In some cases, running the troubleshooter should be enough, so if you encounter this or update error 0x80070424, be sure to try that or any other solution from this guide.

In conclusion, we hope you can resolve the error 0x800706BA problem by applying any of the solutions we mentioned above. If so, let us know by dropping a comment below.

Вы получаете ошибку Windows 10 0x800706ba? Эта ошибка связана с ошибками обновлений Windows на компьютерах с Windows 10 и может быть вызвана поврежденными системными файлами, необходимыми для завершения обновлений Windows. Тем не менее, есть способ решить эту проблему.

Как я могу исправить ошибку 0x800706ba на Windows 10?

1. Запустите SFC и DISM
2. Используйте средство устранения неполадок Центра обновления Windows
3. Включить критически важные службы Windows Update
4. Загрузите обновление вручную
5. Сброс компонентов обновлений Windows

1. Запустите SFC и DISM

Ошибка Windows 10 0x800706ba в основном вызвана поврежденными системными файлами, но вы можете использовать встроенный инструмент Windows, такой как System File Checker (SFC), чтобы исправить ситуацию.

Вот как запустить сканирование SFC:

1. Нажмите Windows + Q и введите cmd .
2. В результатах поиска щелкните правой кнопкой мыши Командная строка и выберите Запуск от имени администратора .
3. Новое окно появляется. Введите sfc/scannow и нажмите клавишу Ввод .
   
4. Дождитесь окончания сканирования и восстановления.

Вы также можете использовать инструмент обслуживания образов развертывания и управления ими для исправления поврежденных системных файлов, которые инструмент SFC не может исправить.

Вот как запустить DISM в Windows 10:

1. Нажмите клавишу Windows и введите Командная строка
2. Нажмите Командная строка (Администратор) .
3. Скопируйте и вставьте в командную строку следующую команду: dism . exe/Online/Cleanup-image/Restorehealth
   
   
4. Если DISM не может получить файлы в Интернете, попробуйте использовать установочный USB или DVD. Вставьте носитель и введите следующую команду: dism.exe/Online/Cleanup-Image/RestoreHealth/Source: C:/RepairSourceWindows/LimitAccess
5. Обязательно замените путь C:/RepairSourceWindows вашего DVD или USB.

Примечание. Убедитесь, что вы заменили исходный путь восстановления своим собственным.

• ЧИТАЙТЕ ТАКЖЕ : Полное исправление: ваш компьютер будет несколько раз перезагружаться во время обновлений

2. Используйте средство устранения неполадок Центра обновления Windows

Средство устранения неполадок Центра обновления Windows – это встроенный инструмент Windows 10, который также можно использовать для устранения этой проблемы, поскольку ошибка 0x800706ba связана с обновлениями Windows.

Вот как это сделать:

1. Перейдите в Пуск > и введите Настройки , а затем нажмите клавишу Ввод .
2. Перейдите в раздел Обновление и безопасность> Устранение неполадок .
3. Найдите Центр обновления Windows и нажмите Запустить средство устранения неполадок .
   
4. Следуйте дальнейшим инструкциям на экране.
5. Перезагрузите компьютер.

3. Включить критические службы Windows Update

Существуют важные службы Центра обновления Windows, которые обеспечивают безопасную загрузку и установку обновлений и исправлений без проблем.

Некоторые важные службы обновлений Windows включают в себя Центр обновления Windows, рабочую станцию ​​и службу фоновой интеллектуальной передачи. Однако когда любая из этих служб отключена, может возникнуть проблема Windows 10 error 0x800706ba.

Чтобы это исправить, выполните следующие действия:

1. Нажмите клавиши Windows Key + R , чтобы запустить окна Выполнить .
2. В окне “Выполнить” введите services.msc и нажмите ОК .
   
3. В окнах Службы найдите службы Центр обновления Windows , Рабочая станция и Фоновая интеллектуальная передача и дважды щелкните их один. одним.
   
4. Убедитесь, что службы настроены на Автоматически и работают.
5. Если они не работают, установите для Тип запуска значение Автоматически для каждой из служб, нажмите Пуск и Применить . ,
6. Перезагрузите систему и продолжите обновление Windows.

4. Загрузите обновление вручную

Еще один обходной путь, который может помочь вам исправить ошибку 0x800706ba, – это загрузить обновление непосредственно из каталога обновлений Microsoft. Тем не менее, вам нужно определить код обновления проблемного обновления, прежде чем вы сможете продвинуться.

Как правило, каждый код обновления Windows начинается с КБ, после чего следует расположение цифр. После определения кода обновления вы можете приступить к загрузке и установке обновления вручную.

• ЧИТАЙТЕ ТАКЖЕ : исправлено: ошибка Windows 10 0x8024a112

Вот как это сделать:

1. Перейдите на веб-сайт каталога Центра обновления Майкрософт.
   
2. В поле поиска введите код обновления и нажмите клавишу Ввод .
3. Из списка подходящих обновлений найдите обновление, которое использует ту же архитектуру, что и ваша система.
   
4. Нажмите кнопку Загрузить рядом с обновлением, чтобы загрузить его.
5. Загрузив обновление, запустите установочный файл и выполните установку.
6. После завершения обновления перезагрузите компьютер с Windows.

5. Сброс компонентов обновлений Windows

Наконец, вы можете решить проблему ошибки Windows 10 0x800706ba, сбросив компоненты Обновления Windows вручную.

Вот как это сделать:

1. Откройте меню Win + X и выберите в списке Командная строка (Администратор) . Вы можете сделать это, нажав сочетание клавиш Windows Key + X .
   
2. Когда откроется Командная строка , выполните следующие команды:
   • net stop wuauserv
   • net stop cryptSvc
   • чистые стоповые биты
   • Чистый стоп-сервер
   • Рен С: WindowsSoftwareDistribution SoftwareDistribution.old
   • Рен C: WindowsSystem32catroot2 Catroot2.old
   • net start wuauserv
   • net start cryptSvc
   • чистые стартовые биты
   • net start msiserver
3. После выполнения этих команд проверьте, решена ли проблема.

Кроме того, вы можете создать скрипт сброса, используя шаги, описанные в нашем руководстве по скрипту WUReset.

В заключение мы надеемся, что вы сможете решить проблему Windows 10 error 0x800706ba, применив любое из упомянутых выше решений. Если да, сообщите нам об этом, оставив комментарий ниже.

Are you facing the stubborn 0x800706ba error? The 0x800706ba error occurs due to improper system configuration.

If you have made mistakes while configuring your machine or installed a program that meddles with system settings, you are likely to face this error.

There are special software programs to fix the 0x800706ba error. However, you must try and understand what caused the issue in the first place.

What Does 0x800706ba Mean?

By definition, the 0x800706ba error represents an application or component that has failed. The error is accompanied by details of why it happened and which component failed.

This error occurs due to a number of reasons. Thus, it is difficult to rectify and prevent the error without understanding the actual cause.

Major Reasons Behind The 0x800706ba Error

First of all, the 0x800706ba error signals that something is wrong with your machine. And that the system is not able to function properly. Common reasons behind this error are:

• You have not installed some software correctly.
• There are invalid entries in your machine’s registry.
• It could be caused by malware or a virus.
• Your system was not shut down properly. Power failure might have caused the system to shut down abruptly.
• You may have deleted an important registry entry.

Fortunately, you can repair the 0x800706ba error easily. There are various tools to help you with the process.

Method 1 – Reset Windows Updates

First things first, you should try to reset windows updates. A major reason behind the 0x800706ba error is a failing program. And a program that was once running fine will fail only with an update. Resetting updates using manual methods are simple and effective.

To reset windows updates, you should follow these steps:

• Login to your machine as a system administrator.
• Now, open the command prompt. Pressing the “Windows and X” keys will open the command prompt in admin mode.

• Next, you should type the following commands:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
Ren C:\Windows\SoftwareDistribution\SoftwareDistribution.old
Ren C:\Windows\System32\catroot2 Catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Once the above commands are executed, verify if the 0x800706ba error is rectified. Technically, resetting windows updates should fix the problem permanently. That is because the 0x800706ba error is caused by a change that conflicts with the existing configuration of your applications.

The only catch in this method would be whether the reset happened fully or not. Since resetting is done manually, you should watch out for missed commands.

PS: If you are facing issues like the 0x80072f8f, click to fix them now.

Method 2 – Critical Windows Update Services

There are several Windows Update services to make sure that patches and updates are downloaded into your machine and installed without any hassles. It is important to ensure that updates are securely downloaded too!

Critical windows updates services would be Background Intelligent Transfer, Workstation, and Windows Update. If any of these services are turned off, you are likely to experience the 0x800706ba error.

To fix the 0x800706ba error caused due to Windows Update services, you must follow these steps:

• Launch the run window. Now, you must type “services.msc” and select OK.

• Next, double-click on the Windows Update option;
• Now, double-click on the Workstation option;
• Next, double-click on the Background Intelligent Transfer service option;

• And then, select “Automatic” as the mode for executing these services. The “Startup Type” should be “Automatic.”
• Now, click on “Start” and then select “Apply.”
• To complete the process, you must restart your machine.

Method 3 – SFC & DISM

In many cases, the 0x800706ba error is caused due to corrupt registry entries and system files. Windows has a built-in tool to help you handle these corrupted files. And that would be the System File Checker alias SFC.

Running the SFC scanner is a very simple process:

• Login to your machine in admin mode and run the command prompt.
• Now, you should type sfc /scannow and then hit the “Enter” key.

• You should wait for the scan to be completed. This will take several minutes.

Once the scan is done, you can expect the 0x800706ba error to be gone. However, if the SFC tool cannot fix the 0x800706ba error, you can rely on Deployment Image Servicing and Management (DISM).

To execute DISM, these steps should be followed:

• Login to your machine as an administrator and run the command prompt.
• Type the following command: dism.exe /online /Cleanup-image /Restorehealth

• If your DISM module is unable to load certain files, it will throw an error. Now, you can use your installation drive (USB or DVD) to execute the above command. However, the command to be used now is: dism.exe /Online /Cleanup-Image /RestoreHealth /Source: C:/< Path to your DVD or USB> /LimitAccess

Method 4 – Update Troubleshooter to Fix 0x800706ba Error

If all of the methods mentioned above fail, you can make use of the Windows Update Troubleshooter. Once again, this is an inbuilt Windows tool. It is often used to rectify the 0x800706ba error.

However, this tool can fix the 0x800706ba error only if it is caused by updates. If the error is caused due to failing registry files, you cannot use the TroubleshooterTroubleshooter to fix the 0x800706ba issue.

Using the Windows Update Troubleshooter is extremely simple.

Here is a step overview of how the Troubleshooter can be used:

• You must navigate to “Start” and type “Settings.”
• Navigate to “Update & Security.”
• Next, select “Troubleshoot.”
• Next, look for Windows Update & select “Run the Troubleshooter.” The following screens will be comprehensive and loaded with instructions on what has to be performed. Follow these instructions and restart your machine.

Method 5 – Advanced Solution

If you are familiar with your machine, you can choose to fix the 0x800706ba error by restoring the system to an earlier point in time.

To restore your machine to a specific time, the following steps should be performed:

• Login to your machine as an admin and click on the start button.
• Now, select “System Restore” under “System Tools.”
• Now, select “Restore my computer to an earlier time.”
• Next, you should choose a restore point. You will be given a list of restore points. Choose the ideal one.
• Click “Next” in the following confirmation window.

When your system restarts, check if the 0x800706ba error is gone. If the error is still present, you may have to choose a different restore point.

Method 6 – The Manual Method to Fix 0x800706ba Error

Last but certainly not least, you can fix the 0x800706ba error using manual updates.

Fixing the error through manual updates is not an easy task. That is because you should navigate to the Microsoft website, find their update catalog, and pick the right update. This is definitely the toughest and most time-consuming way of resolving the 0x800706ba error.

To download the right update, you must scan through a huge number of updates. You must spot the right update code, which caused the 0x800706ba error in the first place.

In general, all windows updates start with “KB.” The numbers following “KB” will help you find a specific update. Only when you find the right update will you be able to download, install, and fix the 0x800706ba error.

Here is a simple overview of how to download updates manually:

• Navigate to the Microsoft website and search for the Microsoft Update Catalog for Windows.

• Enter the update code, before which the 0x800706ba error was not occurring. Now hit “Enter.”
• You will find so many updates with a similar code. Choose the update that matches your system architecture.

• Download the chosen update and install it.
• After the update has been successfully installed, you must restart the machine.

When your system restarts, check if the 0x800706ba error is gone. Most of the time, the 0x800706ba error will persist if the wrong update is downloaded and installed.

And, if the error still exists, you can be sure that the updated downloaded was not right. In such a situation, you must repeat the entire process again.

As mentioned previously, choosing to install an update to fix the 0x800706ba error manually must be your last option.

FAQs

1. Why am I encountering the 0x800706ba error? The 0x800706ba error is typically caused by issues with the Windows Update service or software installations. It indicates a failure to connect to the necessary servers or resources.

2. Can restarting the Windows Update service fix the error? Yes, restarting the Windows Update service can often resolve the 0x800706ba error. It helps refresh the service and establish a new connection to the required servers.

3. Is it safe to modify the Windows Registry? Modifying the Windows Registry can have consequences if not done correctly. It is important to proceed with caution and create a backup of the registry before making any changes. If you are unsure, it’s best to seek assistance from professionals.

4. What if none of the methods work? If none of the methods mentioned in this article work, it is recommended to contact Microsoft Support for personalized assistance. They will be able to provide further guidance based on your specific system configuration and circumstances.

5. How can I prevent the 0x800706ba error in the future? To prevent the 0x800706ba error from occurring in the future, make sure to keep your operating system and software up to date, regularly scan for malware, and maintain a stable internet connection. Additionally, avoid making unauthorized changes to system files or registry settings.

Conclusion

Fixing the 0x800706ba error becomes easy if you are aware of how your machine was functioning before each update. Thorough knowledge of the updates executed in your machine can help you rectify the 0x800706ba error in no time!

Nevertheless, if you are unaware of the updates installed, the points discussed in this post will help you!

Most likely, a lot of you already faced an error The RPC server is unavailable. (Exception from HRESULT: 0x800706BA). This happens when you try to connect to a remote computer or server through a specific MMC snap-in, WMI, PowerShell, WinRM, or another remote management tool.

Troubleshooting RPC server unavailable error 0x800706BA

The easiest way to test the RPC connectivity between the local and remote computer is to run a simple WMI query against a remote host.

In our case, we tried to query a remote computer through WMI from the PowerShell console.

PS C:\Windows\system32> Get-WmiObject Win32_ComputerSystem –ComputerName 192.168.0.14

Get-WmiObject : The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)

At line:1 char:1

+ Get-WmiObject Win32_ComputerSystem –ComputerName 192.168.0.14

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], COMException

+ FullyQualifiedErrorId : GetWMICOMException,Microsoft.PowerShell.Commands.GetWmiObjectCommand

In this example, you can see that the remote computer is not accessible via RPC.

Note. If the RPC communication between your hosts is working fine, you should get the remote computer info in the command output:

Several common problems can cause the RPC server unavailable error:

• The remote computer is switched off or there are other connectivity issues when the RPC client cannot reach the server due to a general network problem;
• The RPC service is stopped/failed on the remote computer;
• The RPC Endpoint Mapper port TCP/135 is not accessible on the remote computer;
• The Dynamic RPC port range is blocked by firewalls between your computer and the remote computer.

First of all, make sure RPC Endpoint Mapper port 135 is listening on a remote computer. Use the following command:

netstat -ano | find "135"

Now you need to check the next things in order to fix the error The RPC server is unavailable 0x800706BA:

1. Check if you have entered the correct IP address or computer name; check if the remote computer is not currently in a shutdown/startup state;
2. Verify that the Remote Procedure Call (RPC) and Windows Management Instrumentation services are running on the remote computer. You can check the status of the services using the following commands: sc query Winmgmt and sc query rpcss. If these services are started, the commands should return STATE: 4 RUNNING. If the services are stopped, run them with the command:

   net start rpcss & net start Winmgmt

3. Or you can run the Service management console GUI (services.msc) and make sure that the Remote Procedure Call (RPC) and DCOM Server Process Launcher services are in the running state and configured to start automatically.
   
   

Firewalls may block access to the remote computer through RPC ports (this is a very common reason). If there are no firewalls on your network, try temporarily disabling the firewall apps (including Windows Defender Firewall with Advanced Security) on both the client and server sides and check the RPC connectivity. Additionally, for the RPC protocol to operate, you must check the availability of port TCP/135 (RPC Endpoint Mapper) on the remote computer side. The easiest way to test for open/closed ports is to use the following PowerShell command:

Test-NetConnection 192.168.1.14 -port 135

If the RPC service is enabled and access to it is not blocked, the TcpTestSucceeded line should contain True.

If port 135 (RPC Endpoint Mapper) is available, but the error “The RPC server is unavailable” is still present, you need to ensure that firewalls are not blocking communication on a dynamic RPC port range. The RPC Dynamic Ports is a TCP port ranging from 49152 to 65535, that must be open for RPC technology to work properly.

Check that the Windows Defender firewall has rules that allow inbound traffic on port 135 (RPC Endpoint Mapper) and the TCP RPC Dynamic Ports range. If there are no rules for inbound RPC traffic (they have been removed), you will need to create them manually.

In Windows 2003 and Windows XP, the range of ports that are used for RPC is 1024 — 65535. In current versions of Windows, the Dynamic RPC port range uses ports from 49152 to 65535. Windows allows you to change the available RPC port range via the registry. This is often used when you need to restrict the open port range for RPC on the firewall.

For example, to restrict RPC ports to a range of 6000-6100, create the following registry settings in the HKEY_LOCAL_MACHINE\Software\Microsoft\Rpc key:

Name	Type	Value
Ports	REG_SZ	6000-6100
PortsInternetAvailable	REG_SZ	Y
UseInternetPorts	REG_SZ	Y

You can force Windows Defender Firewall to open the specified range of TCP ports.

Restart all services and applications that use dynamic RPC port allocation.

You can use a small command-line tool PortQry from Microsoft to get a list of RPC Dynamic ports used by the RPC Mapper service. Use the following command to get the list of RPC endpoints from a remote Endpoint Mapper Database:

PortQry.exe -e 135 -n 192.168.1.201

In this case, 151 endpoints were found. Each RPC point has a dynamic TCP port number next to it that it is listening on. You can check the availability of the RPC port for the desired service using the PowerShell command:

Test-NetConnection 192.168.1.201 -port 49703

Many firewalls block RPC and SMB/NetBIOS even if you have any-any rules enabled. In this case, you must specifically create a rule/policy to explicitly allow RPC dynamic ports.

Note. Windows RPC/DCOM connections often don’t work correctly when NAT is used. Try to connect to your RPC server directly, without using NAT.

Certificate Enrollment Error – 0x800706ba The RPC server is unavailable

If you are facing an error The RPC server is unavailable 0x800706ba when performing the automatic registration of a certificate on a domain controller or in a certification authority, you can find the following error event in the Event Viewer > Application log on the server:

Source: CertificateServicesClient-CertEnroll Event ID: 13
Certificate enrollment for the Local system failed to enroll for a DomainController certificate with request ID N/A from ServerCA.contoso.com ServerCA (The RPC server is unavailable. 0x800706ba (WIN32: 1722))

Or:

Source: CertificateServicesClient-AutoEnrollment EventID: 6
Automatic certificate enrollment for the local system failed (0x800706ba) The RPC server is unavailable.

When you try to enroll the certificate you can see the following message:

An error occurred while enrolling for a certificate.
The certificate request could not be submitted to the certification authority.
The RPC server is unavailable. 0x800706ba (WIN32: 1722 RPC_S_SERVER_UNAVAILABLE)

In this case, the domain controller or other client fails to enroll for certificates from the CA.

This problem can have several solutions, but in most cases, the source of the problem is that your computer is not a member of the DCOM access group (allows access to the certificate service via DCOM) or incorrect permissions are issued. This most commonly occurs when the CA is installed on a DC.

Follow the next steps:

1. On the domain controller on which the certification service is deployed, you need to make sure there is an  Active Directory group CERTSVC_DCOM_ACCESS or Certificate Service DCOM Access.
   Note. If the CERTSVC_DCOM_ACCESS security group has been accidentally deleted, open the ADUC console and manually create it in the Users container (Group scope: Domain local, Group type: Security).
2. Add the following domain groups to the CERTSVC_DCOM_ACCESS/Certificate Service DCOM Access group: Domain Users, Domain Controllers, Domain Computers;
   
3. Update the DCOM security settings on the server with the CA role using the commands:

   certutil -setreg SetupStatus -SETUP_DCOM_SECURITY_UPDATED_FLAG
   
   net stop certsvc & net start certsvc

4. On a server where the CA is deployed, check the COM security permissions. This group must have Remote Access and Remote Activation permissions allowed;
5. After that, try to restart the computer and check the certificate enrollment.

Then check the DCOM Permissions on the server running the CA role. In some cases, even if RPC is configured correctly, incorrect DCOM permissions can block remote authentication.

1. Run the command dcomcnfg.exe;
2. Expand the section Component Services > Computers > My computer;
3. Open the properties of My computer, go to the Default Properties tab, and ensure that the option Enable Distributed COM on this computer is checked;
4. Then navigate to the COM Security tab and click on the Edit Limits button in the Access Permissions section. Check that the Certificate Service DCOM Access security group has Local Access and Remote Access permissions;
   
5. Then click the Edit Limits button in the Launch and Activation Permission section and check that the Certificate Service DCOM Access group is allowed for Local Activation and Remote Activation.

If the above solution doesn’t work, use the nltest command to find out problems with netlogon calls to a domain controller:

Nltest /Server:dc01 /query

Then check that the Active Directory CA request interface is responding:

Certutil -ping

Server “test-DC01-CA” ICertRequest2 interface is alive (62ms)

CertUtil: -ping command completed successfully.

In order to trigger the renewal of a certificate on the CA, run the following command:

certutil –pulse

If you receive the error “Server could not be reached: The RPC server is unavailable. 0x800706ba (WIN32: 1722)” from the non-domain joined computer, ensure that the “Authenticated Users” group is added to the “Certificate Service DCOM Access” group on the CA server.

RPC Server Unavailable Error when Updating Group Policy Settings

When you remotely update Group Policy settings on domain computers from the Group Policy Management Console (gpmc.msc), you may receive error codes 8007071a: The remote procedure call was canceled and 800706ba:The RPC server is unavailable.

To resolve this issue, you must enable the following rules in Windows Defender Firewall:

• Remote Scheduled Tasks Management (RPC);
• Remote Scheduled Tasks Management (RPC-EPMAP);
• Windows Management Instrumentations (ASync-In);
• Windows Management Instrumentations (DCOM-In);
• Windows Management Instrumentations (WMI-In);
• Windows Management Instrumentations (DCOM-In);
• Windows Remote Management (HTTP-In).

You can create a new GPO and enable these rules manually (Computer Configuration > Windows Settings > Security Settings > Windows Defender Firewall > Inbound Rules).

Or you can activate the following default Starter GPOs:

• Group Policy Remote Update Firewall Ports;
• Group Policy Reporting Firewall Ports.

These policies contain all the necessary Windows Defender Firewall rules to remotely update Group Policy settings.

Go to the Starter GPOs section, click on each of the items, and select New GPO from Starter GPO. Create new GPOs and assign them to Organizational Units with target computers or servers.

After a while, try a remote Group Policy update. The error should disappear.