Thank you for the reply and providing me with the links on the Windows 10 reactivation. I read through the instructions but still a little bit unsure. Under Settings > Activation, it shows Windows 10 Education Edition and below that "Windows is activated with a digital license". I have a 25 digit Windows 10 code with Windows 10 installed on a CD-R.
Besides the OS, I am curious also about what will happen with the data on my HDD if I do the motherboard swap? Can I still play the games on there without reinstalling them? I have GTA V and the 5 or 6 installation disks on there and it would take for ages to reinstall again.
If you have an actual purchased Win 10 with a valid license key, you can use that.
Currently, is everything on one drive in a single partition?
If so, and if a reinstall is needed....all that is "probably" gone.