How to Avoid Viruses

First, get really good anti-malware protection. Then when you see the list of searched songs in Limewire, avoid those that have weird file names. Those are obviously viruses. The pattern is usually Name of Artist - Song. Also, look at the bitrate. A big file size determines a high bitrate, but if it's low and among the other songs it's different, then it's a virus. Just don't download anything suspicious.

Smartass answer: Don't use Limewire. Better answer: Get a good anti-virus, download only from trusted people.