Windows is better than average but still has considerable holes in backwards compatibility that are particularly visible in games (and ironically, some of the w

Windows is better than average but still has considerable holes in backwards compatibility that are particularly visible in games (and ironically, some of the worst are Microsoft's own games under the "Games for Windows" banner e.g. Fable 3), but I've seen a number of other random things break or stop working totally as expected when new versions of Windows come out.