Ran into an interesting problem the other day. I was working on a clients machine that every time you connected a USB device the machine would blue screen and throw up a 0x000000FC stop message. The station was a Dell with XP Home SP3 installed and after some digging I found the solution.
If you have a XP disc handy just pop it in and after the pre-installation fun is over enter the Recovery console and replace the following files:
c:\windows\system32\drivers\usbport.sys with c:\windows\$NtServicePackUninstall$\usbport.sys
c:\windows\system32\drivers\usbohci.sys with c:\windows\$NtServicePackUninstall$\usbohci.sys
c:\windows\system32\drivers\usbuhci.sys with
c:\windows\$NtServicePackUninstall$\usbuhci.sys
Simply use the copy command to copy the files over the originals. Be sure to backup the originals just in case. After a reboot everything was copacetic. You gotta love Windows. 
[Via Microsoft TechNet]
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