Sometimes, an application can take over control of the CTRL+P shortcut (possibly just sloppy coding.)
You may be able to reset by going into the Registry. The trouble is, it's not for the faint-hearted. You could disable your machine.
A safe idea, which is worth a shot, is to download the FREE version of "Ccleaner", and run its Registry checker. I don't know if it will reset it. It may think that it's correct, but worth a try.
A simpler way would be to run "System Restore" on your computer. Reset the whole machine to a date BEFORE the driver was installed. If that brings your CTRL+P back, then go for a better driver this time.