I have a strange internet access issue. Frequently I get a "page not found" error when launching IE (I'm running XP pro SP2, but the error happened with SP1 too). Strangely enough I can usually use Outlook to connect to my pop3 email account. I'm using a desktop PC connected to a motorola cable modem directly (via LAN card not USB) on the Comcast network.
Usually after launching IE 10+ times it will finally connect.
Any ideas on what to check? I've used Pest Patrol to check for adware, but none was found.