Windows Upgrade Help and more

I had the same problem. I ended up having to disable fTPM, save and exit the BIOS, then go back in and re-enable it for the setting to truly take hold.

You could also try manually re-entering your Windows 10 product key in the activation settings to see if it re-links your license.

Same here. Agreed, it's a common headache. A quick tip: try unplugging any USB drives or external drives before the upgrade—sometimes that can cause the boot device error.

Same here. You could also enable Game Mode in settings, which helps prioritize your game for smoother performance.

Agreed, switching to UEFI is the key. Just remember to back up anything important before you make the change, as it can sometimes affect your boot drive.