The installation went on my PC (Windows 8.1 Pro) without problems and the Keys were not yet used. However, because the game is so sealed home. So it was at least for me.
The Sims 3 has to say not much. I like it, although I have The Sims 4. ;) Games, both games from time to time. : D
Buy recommendation for anyone who wants to get ideal with The Sims 3.