I have been attempting to fix this problem since January this year and have just learned to deal with it. Now I'd like to actually fix it!
My Firefox web browser is the only web browser to successfully connect to the internet. The catch is that version 3.0.6 is the one I have to run - any time Firefox runs an update I can no longer connect to the internet and have to reinstall the older version. I have attempted to use Opera and Safari with no sucess as well.
Other programs that require internet will also say that the internet is not detected (like for Skype, Mozilla Firebird, Microsoft Outlook), however I can connect my Yahoo Instant Messenger.
I have ran my Symantic Antivirus Scan (which came up clean) as well as SpyBot Search and Destroy and AdAware to remove any malware.
If I enter SafeMode I am able to connect to the internet with IE (which I am doing now).
Any ideas on how to fix this? It would be greatly appreciated!