Question : Hardware wizard keeps trying to install a non existant USB printer after every reboot.

Hardware wizard keeps detecting a nonexistant USB printer upon restart or searching for new hardware. I tried removing all of the USP hardware entries, and even a repair install. It's a clients computer and has been plaguing them (and me) for quite a while.

Answer : Hardware wizard keeps trying to install a non existant USB printer after every reboot.

http://support.microsoft.com/kb/298370/en-us says to delete:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\LPTENUM