Check to see if malware has set up a proxy server
which keeps you from connecting.
FWIW: Many persons who think that they have removed malware from their systems...are sadly mistaken and wind up posting for assistance in one of the BC malware logs.
To check for a proxy server...
1.Please start Internet Explorer, and when the program is open, click on the Tools
menu and then select Internet Options
2. Now click on the Connections
3. Now click on the Lan Settings
4. Under the Proxy Server section
, please uncheck the checkbox labeled Use a proxy server for your LAN
. Then press OK, press OK on the next screen.