IE Issues

I can not open ANY web page with IE. No error message is reported, just the standard “page can not be displayed”.
My network settings seem to be fine – I can connect to other pc’s on my home network, and I can ping random websites and addresses just fine.
There are no errors in the logs.
I have ran a reg-clean, ad-aware, and virus scanner.
I also have installed IE7 – which removed and repaired any instance of IE.
All of these efforts have not helped — I hope someone out there can!!!!!