Windows Upgrade Help and more

Yeah, Before you do a clean install, have you tried running "sfc /scannow" from an admin command prompt to check for corrupted files?

Also, after you enable it, you might need to go into Windows and clear the TPM from the security settings for it to be fully recognized.

You could also try a third-party app like Winaero Tweaker to enable a true black theme. Another option is adjusting your monitor's brightness or using night light mode to reduce strain.