The ASUS 4650 graphics card is actually an ATI Radeon HD 4650 card. You can find its latest driver here.
Updating that driver and removing/renaming your BadDriver file should fix things.
Assuming, of course, you've got the latest version of Quicktime, you've gone to Windows Update and clicked Custom to get even the non-critical Windows updates and that you're editing a camcorder video format that's supported by the program.
(And that you've got at least 20-30 gigs of free, clean, freshly defragmented space on your C drive.)
Thanks Steve. I've done as you suggested and the programme is now working again. Many thanks.
Great news, and thanks for reporting your success!
These steps are the ones that have solved these graphics issues universally within these forums..
1. Display driver installation