I am no software engineer, but Vista is such a huge bloated OS, that sounds like a tall order -- perhaps sort of like axing a 400 lb. dewd to slim down to become a welter weight fighter.
It seems to me that with the release of Vista and its problems, M-soft has all but advertised to the rest of the industry, "Please come and take some of our market share and kick our a**es." LOL
Microsoft has been saying that for over 25 years. While their software is bloated crap, their marketing and strategy is top rate.