Just wondering why people that truly know almost nothing of computer technology even bother to post?
Vista IS a resource hog, but it runs fine on most recent hardware, except netbooks, where it really runs slow. Which is why nearly all netbooks ship with XP or Linux now. However, to get same features with a much lower load, Windows 7 is your answer and retail release will be available in a few weeks.
My PC is long in the tooth (QX6700 with 4GB of 1066 Ram and Raptor HDD's in a RAID set) and takes almost a full minute to boot Vista, Win & boots in 27 seconds, Ubuntu boots in 22 seconds and XP boots in 9 seconds.