No problems with Win10 & Sims here. I upgraded from 8, so there's really not much incentive to roll back, since the differences are minor. All things considered, I haven't really had any problems with Win10, except for issues, when trying to deal with multiple user accounts. Origin seems to work fine. I don't like the way it is pushed, but haven't found much to complain about. The upgrade was intentional, because I wanted to know what I was getting in to. At the time, I had a backup machine. (which has conked out on me) I didn't want to be forced into it, without knowing what to expect. It was mostly a clean install, then an upgrade.