I have two PCs: (1) An old Compaq tower running a dual-core AMD processor at ~2.2GHz. 1GB RAM (I had to remove a 1GB stick that went bad) Running Windows Vista (2) A Gateway laptop with an Intel i3 at 2.4GHz 4GB RAM Running Windows 7 They both have crappy graphics cards and have a ton of software installed. I want to clean them up and get them working as well as they can (without upgrading the hardware). Neither of them will be used much but I want them to be reliable for MS Word, Spotify, and Google Chrome. I don't have much experience with Windows 7 and I have no experience with Windows 8/8.1. So on computers with these specs, what would be fastest: Windows Vista, Windows 7, or Windows 8.1? Thanks!