Windows Upgrade Help and more

Same here. You could also try creating a full system image backup with a tool like Macrium Reflect before attempting the upgrade again.

Agreed, and one more thing: after you enable those settings, you might need to clear the TPM in Windows Security before the checker sees it.

I had this issue on my older laptop. From what I've seen, that 100% disk usage is often a driver problem or Windows Search indexing. I'd check for updated chipset and storage drivers from your laptop manufacturer's website first.

Another option is to manually re-enter your product key from your Windows 10 settings or retail card.