Okay...I've had this problem for a while, and I recently deleted my old limewire program and downloaded the newest version. Anyway, whenever I click on the program and it begins to login it shows the limewire square in the middle of my screen. Then after about 20 seconds my computer locks up, and I have to restart my computer. As I said I've deleted it and reinstalled it. My internet connection is fine. I guess it could be my firewall; I have ZoneAlarm. It's always been fine in the past though, and it doesn't affect any of my other programs.