Go to Control Panel > Windows Firewall. There you'll see whether the Win firewall's off or on.

Your Java's very old... try updating that first. Click on this link Java SE Downloads & download the JRE offline installer.
Remove all other Java versions installed on your computer via Control Panel > Add/Remove Programs. Next, install the version that you've just downloaded. After that, restart your computer.

Did you replace your Gnutella.net file? If so, go & find that file. Hover your cursor over the file - what size is it?

Did you delete LW's preferences folder? After deleting that folder, did all of your LW options (within Tools > Options) revert back to default (ie did you have to re-set all your options)?