Cannot delete a problem caused by a new USB add-on

For several months I have used the Nintendo WiFi successfuly (it is used
through a USB port). I tried to uninstall it today but there was a black out
mid-uninstallation. When I got my computer back on I recieve errors when I
try to uninstall it about "Abnormal Program Termination" and then the
uninstall simply closes out.

I contacted Nintendo and they can't seem to help, so I figured I would try
to come here. I went through and manually removed all the drivers it placed
on my computer but that still does not allow me to uninstall. I tried system
restore but it did not fix the problem leaving me to believe that the file
was corrupted during the blackout.

The question now is, can I remove this device from my computer without
having to format? I have tried to re-install it but it does not work because
of the first file still being on the PC, and there is no repair option for it
annoyingly enough. Not sure what to do now.