I have a similar problem. Just upgraded to LimeWire Pro 5.1.1 after using pro 4.18 quite successfully. 5.1 loads and connects fine however, when I go to search or download, without fail, after a couple of minutes, the computer throws a fit and turns itself off in an instant! It only ever does this when I load the new LimeWire. I tried deleting the preferences as suggested but it made no difference. I also tried installing the offline version of Java instead but again it still switches off after a couple of minutes. Rather stumped here I'm afraid. Any advice gratefully accepted .


System:
Windows XP SP3
Broadband
Antivirus: ZoneAlarm Extreme Security
Limewire Pro 5.1.1