Can I point out a few things that "May" make this issue a bit clearer? XP x64 service pack 2 was released on the 13th of March in 2007 XP 32bit SP3 was released on May 6th 2008 to the public. <-- Slightly over a year later, which is a lot of time in the computing world. Especially at that junction in development. That is well more than a year of files and updates and new drivers that had been added to the 32 bit XP after the OS you are used to. Also XP x64 was the first consumer 64bit OS released by MS. While the driver package you have is relatively new, most companies, once they found drivers that worked well without any issues did not make any changes. (So the x64 driver and its files\entries are quite possibly older than what XP 32bit sp3 comes with.) The issue you have bears much further testing with a clean XP sp3 BEFORE assuming that it is a driver issue when SP3 has newer drivers\files. Also your XP disk has updates and everything in it and is +3 years old? What if it has a buggy driver\update added in that has since been fixed?