I use both MSIE6 and Mozilla Firefox. I was browsing normally and then opened a new MSIE browser. MSIE asks if I want to check each time to see if it is the default browser. I unchecked the checkbox that says "check each time" and continued on.
Just about after that, I was unable to browse any website. I then launched Mozilla, and the same thing - can't browse any website.
I still have other internet apps like ICQ and email, so it isn't my net connection. I've rebooted 4 times, and still the same problem. My laptop on the wireless network is working fine and browsing all websites.
I turned off my firewall for a minute to see if that was the problem, but it wasn't. Even with the firewall off, I couldn't browse websites using either browser.