Fix: Backup fails with 0x800706BA

After upgrading to Windows 10 V1803, users have reported a system image back up error. Reports say that the system image backup fails with 0x800706BA error code. This code tells us that the Remote Procedure Call (RPC) server is not available. In addition, it’s clear that this error is only present on the 32-bit Windows 10 version, as 64-bit users have had no problems backing up.

What causes the Backup to Fail with RPC error 0x800706BA?

A Bug in the Windows 10 32-bit version V1803: If you go back to Windows 10 version 1709, the system image backup works. However, until the Microsoft team provides Windows users with an update to fix the bug it is unlikely that the error will be resolved. There are still solutions that, while might not resolve the error, will certainly get you backing up again in no time.

Method 1: Using a third-party tool for backup

Since, there’s a problem with Windows software itself, specifically 1803 version of wbengine.exe, downloading an external tool, free of errors, would be a better option and it’ll remain safe from any bugs from Windows updates. This method will take you through the steps to installing a popular, third-party alternative, Macrium Reflect.

1. Click this link: Macrium Reflect, and then click on the Home use download option.

2. Follow the instructions on the website.
3. Now, open the email account you entered on the website and click the link provided.

4. Your download will start automatically.
5. Follow these instructions to complete the installation.

6. You’re all set.

Method 2: Go back to Windows 10 version 1709

The error has so far only been reported in the 32-bit  V1803 Windows 10, hence all previous versions like Windows 10 version 1709 is free from this error. Thus, reverting back to an older version of Windows 10 is also an option to resolve the problem. This method will take you through the steps to doing just that.

1. Open the Windows Settings app

2. Click on the Update & Security option.

3. Click on the Recovery tab and then select the ‘Go back to the previous version of Windows 10’ option.
4. Now, click ‘Get Started’.

5. Windows 10 will ask you why you want to roll back, you can select any answer to proceed to the next step where it will ask to check for updates.
6. Finally, choose the ‘No thanks’ option and wait for the older version to install. Once it has, you can start backing up without any problems.

Method 3: Replace the malfunctioning 1803 wbengine file

The system image back up bug in the 1803 version of Windows was isolated to the defected wbengine.exe file. Since we’ve identified the source file causing the error, we can simply replace it to resolve our error. This method will take you through the steps to extracting a functioning wbengine file from an older version of Windows 10, and replacing the built-in impaired file with it.

1. First open the link provided to download a functioning version of wbengine: New wbengine file
2. Extract the file.

3. Search wbengine.exe, right click on it and select Show in folder.

4. Now right click on it again and select Properties.

5.  Now click on the Security tab.

    

6. Now, click Administrators or whichever User account you have access to.

    

7. Click the Edit option.

    

8. Check the Full Control box.

    

9. Right click on wbengine file again and replace it with downloaded version of wbengine.exe that extracted earlier on.

10. Run it, to make sure it’s working and then check if the error is resolved.

Method 4: Update to Windows 10 version 1809

From among all the improvements and new features that Windows 10 version 1809 has, the Windows team has also confirmed that the system image back up error on 32-bit media has also been fixed.

The Windows 10 1809 version is set to be released by the end of November and will be available for all Windows Users soon. All you need to do is:

1. Click on the Settings app.

2. Now click on Update & Security.

3. Select the ‘Check for Updates’ option.

4. The Windows 10 1809 version will be listed and ready for installation.
5. Once the installation is complete, try to use the system image back up software again. It should work now.

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