As soon as I saw your first post I guess that your isp might be the issue. Find TalkTalk here ISP's known to BLOCK or Filter p2p or specifically Limewire. I think it depends what time of day you use it. They shape p2p bandwidth over various hours of the day. So why did it happen suddenly? They don't apply this universally. They apply it to certain groups of users who they detect using up a lot of bandwidth for p2p reasons. So eventually they detected you using it for a period of time & decided to apply the breaks.