Windows Updates Fail After Restoring the OS/VM with Error Code 80070643 or 80071A91



I ran into a rather strange problem after restoring a VM: Windows Updates would not install. The failure codes returned were 80070643 or 80071A91. After checking the integrity of the file system using “sfc /scannow” and rebooting, the problem persisted. Luckily, I found the following fix. A check disk was automatically initiated after the reboot, which found and corrected some problems.


Unable to install updates, getting error code 80071A91 – Microsoft Community

How-to reset the File System Resource Manager if you receive error 0x80071A91   1.     Click Start, click All Programs, click Accessories, right-click Command Prompt, and select Run as administrator. 2.     In the Command Prompt window you will need to type the following, and press ENTER: fsutil resource setautoreset true C:\ 3.     Note: You will need to replace the C:\ with the drive letter that Windows Vista is installed on. 4.     Restart your computer, and then attempt to install the failed update(s).


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