No 64bit version, getting it directly from the MS website, pretty sure you have to have a beta 2 key to install it though. I never installed it due to everyone saying it was just as bad as beta 1. This one is supposed to be much nicer though. 99.8% and climbing. I am hoping my overclocked 4000+, 2gb of ram, and 6800gt will handle it. I just built it, so it sure as he11 better.