Someone else mentioned using Windows 8, but initially had the Java problem I mentioned earlier. That was the first I heard of the 64-bit Java update issue.

What have you tried from the Connection fix thread. Have you tried disabling any of the Advanced > Performance options?
For me to connect with LW 4, I always need to disable the TLS option.
And for Windows 7 or later, Java needs to be set to Run as Admin. else this does affect ability to connect.
http://www.gnutellaforums.com/connec...t-connect.html

What are your initial thoughts on Windows 8 btw?

Another thing you could try is set up a test account on your computer. Disable av and most other security devices. See if LW connects with a fresh connection file. If it does, re-enable each security software one by one to see which one might be at fault. Test accounts are easy to set up and easy to delete. After all this is only a test of connecting to the network, not downloading anything.