There are only two valid responses a port can give when it is scanned: "open" and "closed". A port is considered "stealth" when it doesn't respond to a request at all. All the GRC port scanner does is fire packets out at your ports. If your port answers back, it will be listed as either "open" or "closed". if your firewall prevents your computer from answering back to GRC's port scanner, the port will be listed as "stealth". It as simple as that.

I believe I read that Norton does not recommend using their firewall with others b/c they can interfere with each other. So probably best to disable your XP firewall. Your choice of which one. To configure your firewall(s) to allow LW full access see:
1. http://www.limewire.com/english/content/firewalls.shtml OR 2. Configuring Norton Internet Security

The bug test I asked you to is suppost to give you a True/False response. I wanted you to tell us which one it is True/False?