Windows Upgrade Help and more

Yeah, Have you checked if your motherboard's TPM 2.0 is enabled in the BIOS?

Same here. Yeah, that Pentium is actually on the official unsupported list, so the normal installer will always block it.

Did that help, or are the new COM ports still popping up after you removed them?

Yeah, Agreed, and also make sure you've cleared any existing TPM or platform keys in the security settings—that can sometimes unlock the option. Good luck!

Same here. I had the same problem. For me, it was also about making sure my disk was using a GPT partition style and not MBR.

Agreed. You could also try manually checking for a TPM firmware update from your motherboard manufacturer's website.

Yeah, I had the same problem. After finally getting TPM working, I still got hit with a weird driver compatibility error that took forever to track down.

Agreed, reseating the RAM is the best first step. A quick extra tip: if that doesn't work, try booting with just one stick at a time to rule out a bad module.