Windows Upgrade Help and more

This. Agreed, that's a solid fix. One extra thing: run "sfc /scannow" in Command Prompt as admin to check for system file corruption. Let me know if that works.

Yeah, You could also try disabling CSM in your BIOS, as that sometimes forces the proper UEFI environment the installer wants.

Can confirm. Did you also check if the TPM is enabled in Windows itself using the security settings?