driver sweeper will wipe out the drivers you select, I believe it does video, audio, and chipset drivers only.
Anyway... what you need to do is go to the Asus website and download your video driver. You didn't give the full model number of your Asus and I don't know what operating system you are using so I can't directly link it. There are two G73's on their website: G73JH and G73JW. You will find your driver download under "VGA" in the downloads section. Any other drivers you may need will be found on that website too.