Just a couple of tips today for anyone who's interested in, or planning on upgrading to Windows Vista:
1. If you've purchased an upgrade installation version of Vista, please make sure you perform the upgrade from within the legacy OS. That means booting your computer to the existing desktop, and then inserting the Vista installation media. If you boot your computer from upgrade version Vista media, then you're going to have nothing but headaches. Also, when upgrading to Vista from Windows XP, make sure that you have SP2 installed on XP before performing the upgrade.
2. After you've successfully installed Vista, whether an upgrade or a clean install, make sure you go to microsoft.com/genuine and validate your copy. If you don't, you could run into problems down the road.