For the people with the 12% issue please search the posts as there are so many solutions to your problem.

Vista issue ... What version of Java are you using and if you go to add/remove programmes then how many versions and what are they in there.
Check your firewall setting and your antivirus also are you using Alcohol at all ??

I tried alowwing my firewall to accept the limewire. I tried all of the suggestions that were on the website. Im just not sure what else it is thats making it now work. It worked fine on my last computer.