Glitchny: I ran into the same problem when Win Xp was introduced last year. I believe Iomega and Microsoft didn't get together and include all drivers for zip drive. I know the 250 meg zip drive doesn't have the problem. My zip 100 was detected, but when I was trying to use the drive a week later, it wiped out 2 of my full zip disks. Go to Iomega and download the latest zip 100 ide (atapi) drivers. Install, and reboot your computer. You will have any more problems.
ROJAS