Some users experienced errors like 0x8000ffff , 0x8007007e , or 0x80073701 during the update process, sometimes leading to boot loops.
Addressed a timing issue that occasionally prevented eligible devices from upgrading to Windows 11. Reported Issues with Build 22000.795 Windows 11 Pro official 22000.795 July 2022
You can find more technical details in the official Microsoft release notes or detailed breakdowns on BleepingComputer and Pureinfotech . Cumulative updates for Windows 10 and Windows 11 Some users experienced errors like 0x8000ffff , 0x8007007e
Some apps using .NET Framework 3.5 (specifically WCF and WWF components) might fail to open, though this can be mitigated by re-enabling those features in the Windows Features control panel. Some users experienced errors like 0x8000ffff