Is there a Brickwall in front of the Blue Globe?? Has anything changed with your ISP?? Could possibly be a Modem/Router issue.
There was a huge problem with Vista + Mcafee + Limewire several months ago.
http://www.gnutellaforums.com/genera...-solution.html
May need to post your system details.
System details - help us to help you -> Provide these details when you post!!!