Windows 10 Upgrade

bro67 said:

If the motherboard did not ship with a OS, you have to activate with a key.

True. And if it shipped with an 8/8.1/10 Home key and you subsequently upgraded to W10 Pro then a clean install will automatically install W10 Home, as it does on one of my machines. There are ways to modify the install media to force a Pro install, but the simplest way (provided you have previously activated 10 Pro on this machine) is to let it install Home then upgrade to Pro by changing the installed key to the generic 10 Pro key.

I have 3 different keys for Windows 8.1 pro. Will that work if I show one of them on a clean install.

neveready said:

It's a custom build with Keys from old Tech Net Pro days.

neveready said:

I have 3 different keys for Windows 8.1 pro. Will that work if I show one of them on a clean install.

Yes, provided the keys haven't exceeded their activation counts.

There are a couple that I never used.

Final update. Placing Win 8.1 key in clean install activated Win 10 Pro