I was thinking about it, and a lot of people kept wanting to install Home Basic, or Starter, on their netbooks etc. Now if my understanding is correct, they're all the same install, just the avaliability of features is determined by the license. A windows anytime upgrade only takes a few minutes, as it is merely switching on features within the OS. I don't see anything in terms of performance difference either, the only issue is the price. So my question is, is there any reason NOT to run Ultimate?