I was stupid enough to pay Microsoft $200 for a windows Pro license 7 years ago. Then, it was basically impossible to release it from one machine and activate it on the other. FUck slmgr. So I ended up using whatever activation program that's named after construction material... which clearly is what I should have done in the first place. THEN they pulled a sleazy trick to upgrade my machine from 10 to 11, disguising it as a regular Windows update. Thank god I don't even have access to that machine any longer. Um... it does have 32 GB of RAM though and I kind of want to get it back.