My Vista completely erased my XP's i386 folder. I had installed Vista on a completely separate hard drive. Apparently Vista can fuck with completely separate physical hard drives - if I ever do try to dual boot again, you can be sure that whichever one I'm not using, I'll disconnect. Also, Vista fucked with my sound drivers - until I overhauled everything, wiped all the ahrd drives and reinstalled XP (not touching Vista) my speakers had this incredibly annoying, high-pitched squealing sound whenever you turned them up too loud. Sounded like feedback, only it wasn't. I know because getting a new sound card didn't fix the problem, and when I hooked the speakers up to my ipod, no screech. And it started right after I installed Vista.