Try Grandpa's advice here
http://www.gnutellaforums.com/showth...mputer+freezes
*If you're unsure of how to delete the preferences folder (Limewire folder), there are details here
http://www.gnutellaforums.com/showth...threadid=36420
There's also a Java (JRE) beta you can try if you like
http://java.sun.com/javase/6/download.jsp