I have a LaCie 500gb usb hard disk, it works fine on windows 7 but with vista, windows explorer crashes immediately just trying to access the drive. i've been through several forums that have found solutions but so far they all seem to be issues with other programs that are not present on my machine. and i am running vista and 7 on a dual boot machine and i am using the same port on both os's so it shouldn't be a hardware issue.