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Windows 11 update error encountered when upgrading from Windows 10
When Windows 11 Setup throws a critical error 0x80888002 – 0x40008, it usually means something went wrong during the "Prepare Safe OS / Finalize" phase. This often points to disk structure issues, corrupted partitions, or a damaged recovery environment.
One solution to fix Windows 11 update error encountered is to check disk health with chkdsk command. Open the Command Prompt as Administrator Press Start → type cmd → right-click → Run as administrator.
chkdsk C: /f /rWhen prompted to schedule at next restart, press Y and reboot. This will scan the C: drive for bad sectors and automatically fix filesystem errors. After restart, open Event Viewer → Windows Logs > Application → look for Wininit entries to see CHKDSK results.
Another solution is to run both SFC and DISM to fix missing or corrupted Windows files that Setup depends on:
sfc /scannow DISM /Online /Cleanup-Image /RestoreHealthThese two commands will compare system files to Microsoft's component store and replace any damaged ones.