1. Use your Add/Remove control panel & remove all Java versions. Then reinstall Java using only the "Offline" Java version here which is a 15 MB downld:
Java 1.5 (take the JRE)
2. Download only the "Offline" LimeWire installer from here:
http://www.limewire.com/english/content/download.shtml
3. Make sure any firewalls you have are configured to allow LW full access. Only have one active firewall!
Firewall configuration instructions (click on link).
Also if you have a high speed modem/router which might have an internal NAT firewall, then you will need to port forward. Find your model here to see
http://portforward.com/routers.htm
In fact, I would recommend doing 3. (setting firewall) 1st, then 1. (Java) & then install Limewire last!