For starters, don't have 2 software firewalls running together. Rather than being more protected, they'll interfere with each other & won't work properly. One software firewall is enough
Seems that there's a conflict with McAfee & Vista...have a read through this thread. If you use the forum search, or look through the threads here in the Vista forum you'll find more info
http://www.gnutellaforums.com/showth...ghlight=mcafee

But this person has been able to use LW with McAfee
http://www.gnutellaforums.com/showth...024#post257024


Are you using Java 6?
http://www.gnutellaforums.com/showth...ght=Java+vista