Spybot Search and destroy:
http://www.safer-networking.org/en/index.html
AVG Free edition:
http://free.grisoft.com/doc/1
Download and update these programs, then start the computer in "safe mode" (F8 at during reboot until you see the choice), and THEN run them to make sure you get a good cleaning the fist time.
Start/run msconfig/start-up is a great way to free up resources, uncheck anything you recoginize as not being essential, google anything else and normally you will get a page that lets you know if it is "critical".
Un-install Lime Wire
Un-install Lime Wire
Un-install Lime Wire
strange, when you type Lime Wire as one word you get this...[censored]