You'll read such things over in the http://www.usbman.com forums. Most are resolved either with the Tips pages or installing motherboard , latest bios or other changes.
Your post lacks the details to ask if you installed the motherboard drivers since it's unknown if you have some Via, SIS or such a board that Microsoft doesn't automatically get the latest drivers or the BIOS issue.
I have recently installed Windows XP Pro on a machine with a Micrtosoft USB intellimouse installed. Thge mouse is connected to a USB port on a LG Flatron 915FT monitor.
When windows is restarted the mouse dissapears from the hardware profile and consequently does not function.
By using the add hardware wizard the mouse immediately comes to life even if you then cancel the wizard. The mouse is then in the hardware profile and works fine. As soon as the machine is rebooted it dissapears again.
How do I solve this?