I too experienced viruses originating from the limewire program.
Alot of files in their database are infected.
Had one a while back that McAfee's didn't see. Kept starting limewire
whether I wanted it to or not. Had to IPL my PC.
Now I've been getting alot of them detected as I try to download
music files.
I think Limewire needs to clean up their databases.
Alot of bad stuff in there!

BTW I've even upgraded to version 4.18.3
The JUNK filter doesn't seem to do much.