virus effects limewire

ok I love this program and have used it for some time.

I recently downloaded a file scanned it and was clean.. upon doubleclicking on the file inside the .rar file.
norton said virus found and deleted it.

great but after which I was hit buy system congestion
hmmm

I've run virus and spyware scans repeatedly.. and think it's been removed.

but now something is making limewire open all by itself.. I shut it down then two minutes later it starts back up.. strange but perhaps you guys no what's going on and how I can rid myself of this problem