Archived from groups: microsoft.public.windowsxp.hardware (More info?)
First, disable an Automatic restart in case of system failure (System
Properties/Advanced/Startup and Recovery Settings) and get a STOP number.
Second, test any other USB device.
Third, if a reader doesn't use generic USB drivers then just dig in
system32\drivers. Explorer status line provides a driver description.
Fourth, drill down to HKLM\SYSTEM\CCS\Enum\USB and or USBSTOR, find your
device ClassGUID, delete/edit the keys etc.