I had an older Pentium II 400 running Windows 98 when I bought this item. It worked great and I would have rated it 5 stars. However, I recently purchased a new top-of-the-line Pentium 4 from Dell (awesome by the way), which was of course loaded with Windows XP. I have since wasted countless hours trying to get this drive to work under XP. My system will simply not recognize the drivers -- even the newest XP driver downloaded from Viking's website. All of my other hardware peripherals connected beautifully under XP. After spending time on the phone with Viking support, I was more frustrated than ever. There are much better (and cheaper) alternatives at your local Best Buy or Circuit City. I bought a SimpleTech CF reader for $[money] at Circuit City that works beautifully with XP. Go in another direction!