Perhaps something happened to your USB hub/ports.
Generally, see http://www.yqcomputer.com/
First, make sure that Device Manager will show "ghost" devices:
If you have any leftover printer entries in Device Manager, remove them.
Reboot. Now try adding the printer.
If that didn't work, you can try removing all of the USB controllers and
hubs. There is a catch, however, you don't want to remove ALL of these
if you ONLY have a USB keyboard and/or mouse. When you re-boot, you
won't have any input device, and Windows will not proceed.
If you can find a PS/2 keyboard and/or mouse, use it for the following
Restart in Safe Mode
Remove all USB devices (except USB keyboard and/or mouse) from the
Device Manager in the following order:
HID and/or Composite USB
USB Root Hub(s)
USB Host Controller(s)
Physically unplug all USB devices (except keyboard and/or mouse)
Shutdown and reboot
Lem MS MVP -- Networking
To the moon and back with 64 Kbits of RAM and 512 Kbits of ROM.