I am running W8.1 without issue. I have a small app installed (Start8 by stardock) that returns the start button to the task bar so it looks & functions just like W7. I don't even see metro, it boots straight to the desktop. Unless you want to run metro as a FE (personally I don't like it) I don't see a lot of gains from upgrading from W7. If you are bored with CF and want to try something else, Ride Runner & Driveline might be two great choices for you to try.