Limewire won't give you the viruses the song's you download from Limewire may contain trojans, I have a security system that my dad uses for his business and it detects everything. Most of the time the unknown songs that are hard to find that you like contain a virus and it's usually just a sleeper which means it just sits on your computer and does nothing it's just there. It may have been a song it may not, usually it's something you pick up from a sketchy website that causes a computer crash or malfunction. My answer would be to use torrents if anything and if your dad really doesn't want viruses he better fork over money to buy the songs.
Everyone be reppin the tall tees I be reppin the small tees.