Running pre release Windows versions is like going on a pub crawl with your mates. You know you are in for grief. RC1 is a whole lot better than Beta 2 as far as reliability is concerned, but I wouldn't use it for doing any important work on . If you have any out of the ordinary or later type devices , don't expect driver support either. For general non critical usage its seems fine, although I have encountered a few IE glitches so far. Take the plunge and blast into MS oblivion.