You may also see variations of this error like ‘System Restore failed’, ‘An unspecified error occurred during System Restore’, ‘0x80071a91 system restore’, ‘system restore windows 10 error 0x8000ffff’, error '0x80070091' and such. You may get errors (as shown in the image below) like “Syst em Restore did not complete successfully ” on Windows 10, Window s 7, or other versions. By doing a System Restore, the driver update will be undone, so the issue related to the update will be fixed.īut System Restore might not be successful at all times, it can fail due to various reasons. Say, for instance, you have performed a driver update and you r Windows computer beh aves strangely after that. Basically, it is used to undo the changes made to your system. System Restore is a powerful utility in Windows that allows your system to roll back to a previous point in time.