Hi, I use windows XP sp2 windows media center edition. I like it, have had no real problems with it and does all I want it too. I run a Intel Pentium D processor 3.0 Ghz with a gig of ram. All seems to be working well, I cannot find anything wrong with windowsXP media center at all, in fact, I find it to be a very good OS. Everyone has their own ideas I guess of what is best, but all in all, if the OS works and does a good job for you, then that is all that is necessary. People have been discussing and argueing for years now which is the best OS and if asked of 10 different people, you will get 10 differents opinions and ideas of what they think is best. The worst system on earth that microsoft ever made ( I have been a computer technician for 10 years now ) was Windows ME, but even then, you will find people who think it is great. In time I shall change over to 64 bit, but I see no reason to do that right now as there would not be a plentiful real benefit to it. Just my opinions of course, Dakota