I have a copy of the Vista Beta that I tried to load on my Dell desktop machine and my E-Machines laptop, but couldn't load it on either one. Both had the same exact problem, incompatible disk controller. It would be interesting to see if anyone with a Mac could get this beta to run. It seems MS has locked down the hardware requirements pretty tightly. Rumor has it that you might have to have a certified "Vista compatible" PC. This is just one of the many reasons that I am wanting to switch to a Mac. I have waited all these years as MS has slowly stepped up toward an OS that looks and feels like a Mac and now that they are finally getting somewhat close, I can't play.