Vista sucked so bad. I got a nice new laptop and it was constant pain. One of the real breaking points was that it would refuse to let me modify or delete some files even as superuser. If I recall correctly they weren’t even system files, maybe a separate partition or something.
I tried installing XP but there was some sort of driver issue with my CD drive. It would start installing fine, but then once it tried to reboot off of the HDD to finish the installation it couldn’t find the installation CD to finish copying things, so the install just crashed half-way done.
I installed Ubuntu on a partition, dual booted for a while. After a few months I realized that I never even used the Windows partition anymore so I wiped it.