Sounds to me like it could be malware that is trying to access the Internet. Let's make certain that isn't the case before we proceed.
Please go to the Malware Forum
and run all the steps located in the START HERE
. These self-help tools will help you clean up 70% of problems on your own. If you are still having problems after doing the steps, then please post a HiJackThis Log in THAT
If you are still having problems after being given a clean bill of health from the malware expert, then please return to THIS
thread and we will pursue other options to help you solve your current problem.