Gotcha Geezer(have been out before the snow arrives). So if you had an upgrade from 7 or xp that was the pro version, you automatically inherited w10 pro. That explains a lot I suspect. If you are using a desktop or a premium spec laptop then w10 pro is going to run without problems, but I suspect that if you are running a standard spec older laptop or tablet then the pro version is going to be quite a challenge for the device. W10, we know, requires a decent enough spec. to run properly and the pro version is even more resource needy.