Use windows 8 8.1 is better in general. I have 8.1 and i uptaded to 10 at some point and it kills the pc performance so i reverted to 8.1 again. In a low end pc this becomes very visible. Do not try to use 7, will most of the time drivers will not work. Windows 10 may not seem like it but its awful at playing games on. Windows 8.1 requires a bit less pc power.