This is typical something related to P2P applications and unwanted baddies you get together with filesharing. Please try the following :
Shut down your internet connection and close and uninstall ( via START CONTROL PANEL Software(Add or remove Programs) the P2P application(s) you are using.
If you have an antivirus program please run it on your computer and see what comes out and post back any result before undertaking any other measures.
Edited by fozzie, 01 April 2007 - 04:12 AM.