Run setupdiag > post a share link into this thread
https://learn.microsoft.com/en-us/windows/deployment/upgrade/setupdiag
Uninstall any of these non-Microsoft software:
a) antivirus
b) firewall
c) drive encryption
See if you can perform an in place upgrade repair using a Windows 10 iso 21H1.
If the in place upgrade fails > post any error code and message
https://www.tenforums.com/tutorials/16397-repair-install-windows-10-place-upgrade.html
https://www.microsoft.com/en-us/software-download/windows10
https://www.tenforums.com/tutorials/9230-download-windows-10-iso-file.html
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Please remember to vote and to mark the replies as answers if they help.
On the bottom of each post there is:
Propose as answer = answered the question
On the left side of each post: Vote = a helpful post
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