Windows Upgrade Help and more

This. Agreed, that often helps. Also, try pausing any third-party antivirus software temporarily during the activation process.

This. I had the same problem. For me, I had to clear my TPM in the BIOS before the PC Health Check would finally recognize it as supported.

Had the same problem. Hey there, that error can be super frustrating, but you're already on the right track by making a backup! A system image is a great safety net, but for total peace of mind, I'd definitely copy that Documents folder separately to that external drive as well—it's a quick extra ...