I did a fresh install as soon as I got it.
There is a good guide for doing it. (It's not quite as straight forward as putting the vista disc in
)
M1330 Laptop Vista Reformat To Remove Bloatware -simplified!!! - Notebook Forums and Laptop Discussion
check it out if you want to change partitions or reformat.
If you want to put XP on it and it doesn't see your hard drive, you will need to go into the bios and change the SATA controller from whatever it is at default to the other option (can't remember which way round. ACHI - SATA i think)
Then it will say you can't do that.. please diasable flash cache (or something, it;s been a while since I did it)
Do that, then re-do the ACHI -SATA (or other way around) bit. Then you can get XP on