Posted 30 December 2010 - 04:24 PM
I had the same symptom and did the following - this is not a suggestion for you, but describes what I did with the same symptom.
A trojan attempted to infect my PC and was stopped before it could install.
The malware files were cleaned off, but a setting was left behind, specifically, a setting to tell Windows to use a proxy server but without an address for the proxy server. Here is what I did:
1. Opened Internet Explorer.
2. Clicked Tools, Internet Options.
3. Clicked the connections tab.
4. Clicked the LAN settings button.
There was a checkmark in the check box "Use a proxy server for your LAN", but the Address was blank. I unchecked the box, then OK and OK, and my connection was restored. Again this is not advice for you, just a record of what I did with a similar symptom, but since it was so simple to correct I am sharing my experience.