If a USB driver insists on reinstalling when you reboot, try
Microsoft's free device-management tool for XP and Vista. DevCon
will erase all of your USB device drivers, making your PC just like
new. Then it will scan to relocate the devices and reinstall their
drivers. This program is not for people who think "hash code" is
something to eat with fried eggs. Back up your PC first: This trick
can restore a sick system to health, but it can also flatline it.