Barkley on 03 January 2017
I bought my Windows 10 Pro key online for about £14, works perfectly.
Anyway, for a new linux user I'd recommend Ubuntu.
edit: http://www.mrhightech.net/operating-systems/3554-windows-10-professional-0885370903911.html
^ That's the site I got mine from, £12 at the moment. Though if I remember right they don't send the key instantly, think I had to wait several hours at least.
