Are you using the Windows XP driver? There is a possibility that you may need to roll back the driver if it installed the Vista or Windows 7 drivers. I had a problem with my Intuos 3 with Windows 7 that we could never get resolved and I finally had to get the Intuos 4 (awesome tablet by the way.) I also have a Bamboo Pen and Touch that I use with my laptop and it works fine with Windows 7. My guess is that you are experiencing a driver issue with XP.