Did you try using ad-aware?
http://www.google.com/search?q=adawa...UTF-8&oe=UTF-8
Or might your anti-virus-software remove LimeWire?
Please check your antivirus programs configuration.
Besides: If you run Windows, you are in danger of spyware whatever you do. Antivirus programs do help, but they are no guarantee, that your Windows won't ever be infected.
Besides again: You stumbled into the Phex Forum with your question, which also is a Gnutella p2p Program, but isn't LimeWire.
Maybe that had a reason, and you should
give Phex a try...
Have a nice day