For the Windows update error code:
Try these troubleshooting steps:
Open administrative command prompt and type or copy and paste:
sfc /scannow
dism / online /cleanup-image /restorehealth
If the above do not fix the underlying problem then uninstall any of these non-Microsoft software and perform an in place upgrade repair:
a) antivirus
b) firewall
c) drive encryption
0x800f0831
Message Description Mitigation
CBS_E_STORE_CORRUPTION; CBS store is corrupted. Corruption in the Windows Component Store. Repair the component store with Dism RestoreHealth or manually repair with the payload from the partially installed component. From an elevated command prompt and run these commands:
DISM /ONLINE /CLEANUP-IMAGE /SCANHEALTH
DISM /ONLINE /CLEANUP-IMAGE /CHECKHEALTH
DISM /ONLINE /CLEANUP-IMAGE /RESTOREHEALTH
Sfc /Scannow
Restart the device.
https://learn.microsoft.com/en-us/windows/deployment/update/windows-update-errors
https://www.tenforums.com/tutorials/16397-repair-install-windows-10-place-upgrade.html
https://www.elevenforum.com/t/repair-install-windows-11-with-an-in-place-upgrade.418/
https://www.microsoft.com/en-us/software-download/windows10
https://www.microsoft.com/software-download/windows11
https://www.microsoft.com/en-us/evalcenter/evaluate-windows-server
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