Upgrade Windows 10 and replace the old hard drive with a new one on a fresh computer.
Upgrade Windows 10 and replace the old hard drive with a new one on a fresh computer.
You're looking to switch from Windows 8.1 to Windows 10 while keeping the same hard drive, and you're considering installing Windows 8.1 again using the original product key. It's possible if you have the correct product key and the hardware remains compatible, but be aware that some features or updates might not be available for older versions on newer systems.
I’ve managed it. From what MS advised, you might need to revert to your older OS and retry the upgrade. This could happen if Windows 10 blocks your key, but that shouldn’t occur.
I spent some time in a tech store fixing computers and frequently handled old product keys.