Theres alot of documentation on this
here is a brief excerpt from this site
http://www.lockergnome.com/issues/daily/20020917.html
"Generally, the SP1 upgrade was flawless... unless you happen to be one of the poor souls using Norton Internet Security 2002 and IE6. The JPGs and GIFs would get iffy about loading. You ended up with a lot of the red X placekeepers on Web pages while browsing. Microsoft's KB insisted you needed to check the "Show pictures" box in Tools | Internet Options | Advanced | Multimedia. And, of course, that WAS checked. I now use a router so don't need the Norton's Firewall. Dumping that cleared the problem for me. A forum contributor indicated that dumping Internet Security, installing SP1, and then reinstalling it had worked for them. Another contributor indicated that turning off the firewall from the configuration menu and then turning it back on worked for them. Regardless, the original challenge was connecting the loss of graphics to running Norton Internet Security at the time of the SP1 upgrade. Amazing how dumb pages look with buttons and slick graphics replaced with red Xs." This comes courtesy of Hal Pawlowski.
Hope this helps!