Heaps of files shared on the network are infected... especially .zip, .rar & .exe files. The star rating means nothing, unfortunately...that's just an indication of connection quality - not of file quality

Always check files with Bitzi before download - if other users have rated the file then you'll get some idea of content & quality: How to use Bitzi

Even if the file doesn't have a Bitzi rating, it may still be infected.

You're very lucky/smart to be using an AV that picks up nasty files. Many users aren't so fortunate
* WARNING: Viruses on network you should be aware of ! *

If you're a new user, it might be good to read the LimeWire FAQ and User Guide , just to get some more info.