I think this is the key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Printers
I deleted everything in here that didn't seem to be from MS.

I think I also did the same thing here too:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Monitors
but they seemed to have come back and may not be a good idea to delete again haha.