content: Yeah, looks like j_ is right. I did some quick googling, and according to neowin and a few other places there's no clear upgrade path for XP/Vista to 10.  "In either case, upgrading to Windows 10 will be free, as long as you make the jump in the first year after launch. Windows Vista and Windows XP users with compatible hardware can buy an upgrade to Windows 10, but this will require a clean install that erases all programs and files" - http://www.pcworld.com/article/2898794/heres-how-windows-10-upgrade-paths-will-work.html Looks like they'll charge some kind of an upgrade fee to move up from Vista. G2A has windows 8.1 professional keys for $37 right now, which isn't too bad, and there are other places that sell/swap software as well.