Error 0x80071a91 on Windows 10 Update
Windows updates are crucial to the system. They provide security updates that are important to the system. If the Windows update does not come, it can be a threat to the system, and therefore such problems should be addressed as a matter of priority. Known bug with Windows updates – error 0x80071a91. Error code 0x80071a91 occurs when “Transaction support in the specified file system resource manager is not running or has been disabled.” This happens when a service named File System Resource Manager (FSRM) does not work properly, although there may be more reasons.
How To Fix Error 0x80071a91 When Updating Windows 10
Reset FSRM service
As mentioned, the main cause of the error is the interruption of the File System Resource Manager service (FSRM). So we can try to reset this service. To do this, open a command prompt as an administrator and enter the command:
fsutil resource setautoreset true C: \
After executing the command, restart the system.
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Temporarily disable antivirus
It is possible that anti-virus software interferes with the Windows update process. In this way, we can temporarily disable the antivirus program and check if it helps.
Reset Windows Update Components
Resetting the update center cache in Windows 10 can be a helpful action on this error. Refer to the manual at the link, it fixes most problems with errors when updating and installing Windows 10 updates.
Delete Common Log File System (CLFS) transaction logs
Open a command prompt as an administrator and enter the following commands, one by one, pressing Enter after each:
cd / d% SystemRoot% \ System32 \ SMI \ Store \ Machine
attrib -s -h *
del * .blf
del * .regtrans-ms
Reboot the system and see if you can upgrade Windows.
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Restart the Windows Update service
Open the device manager and go to services. In the services, find “Windows Update”, right-click on it and select “Restart”. If you have disabled this service, then turn it on necessarily.