Flickering graphics in Internet Explorer 7

I am stumped, but I have to get this fixed. IE7 on my president’s laptop has a problem with flickering graphics on webpages like www.cnet.com. They are the dynamic content that updates frequently on the webpage.

I’ve cleaned out spyware off the PC. I got on the phone with Dell and ruled out the graphics card as an issue. I’ve downloaded the latest flash program off adobe.com and installed the latest graphics card. I’ve rolled IE7 back to IE6 and reinstalled it back to IE7. I’ve reset IE7 back to factory defaults and I still have this problem.

Just to see if there was only in IE7, I installed Firefox and had no problems loading this website – no flickers at all, so I’m sure it is IE7. I am stumped. Can someone help, por favor?