do your self favor

If you are going to install Windows Vista on your computer go out and buy a Expensive HARD DRIVE 40 gigs or larger they are cheep now and you do not undo your Other Operation system at all you remove the drive with your working operation system and install new one have fun experimenting with Windows Vista as a clean install then if you do not like it swap the drives back and you do not have to go and reinstall any thing
I got a 200 Gig Drive from Office Depot last week for 49.00 after 60.00 Mail In Rebate and I am having a ball with Windows Vista only a few things do not work yet such as my HP 5610 All-In-One