Connectivity Problem..virus or system prob?

[javagrog]

Yesterday out of the blue I could not connect to the internet with my windows explorer. Outlook express still gets my e-mails so I have a good connection. The computer that can't connect is hardwired into the modem, I am writing this from my laptop connected wireless to the same modem, so I know the modem isn't the prob. I have run spybot, adaware, spysweeper, and mcafee virus scan 2005 and seem to be clean. I did a system restore back to Jan 1, and still can't get a good connection. When I click on the icon to start explorer, it takes forever (ok, 3-4 minutes)0 to bring up a web browser and I get the "page can not display message". I did connected briefly late last night and was able to surf around, but seems I can't now.

I am running XP on an HP. Any help would be most appreciated!