@artee
First of all, this is the Shareaza forum, not the LW.......
If you tied to uninstall LW using the Control panel>Remove Program option you will need to reinstall LW and then use the START>Programs>Limewire>Uninstall option. If your system doesn't allow you to reinstall LW then you'll need to uninstall the rest of the program using the CCleaner:
http://www.ccleaner.com/download/ 
@smiles9
You actually do not have to disable the firewall, you should rarther configure it to allow your P2P client access to the network.
Read here on how to configurate your firewall (connection problems -click first):
http://www.gnutellaforums.com/showthread.php?t=51361