Open the ‘Start‘ menu and type ‘CMD‘ in the search bar.  Right click on ‘CMD‘ and select ‘Run as Administrator‘

When the command prompt opens up type the command ‘printui /s /t2‘.

Select the Printer you would like to Remove and click on ‘Remove..’.  Remember to select ‘Remove driver and driver package’.

If you have difficulty removing the driver and package you can stop and start the ‘Print Spooler’ service.  You can do this by searching for ‘service.msc’ in your Windows 7 start menu (Remember to Run as Administrator).  Find the service named ‘Print Spooler’.  Right click and Stop the service and then Start the service.  After you have done that you can try removing the Driver / Driver Package again.