I found a bug on Avast Antivirus Free. When I download file more than 3 GB using Utorrent or Bit Torrent the torrent client would not responding continuesly each minute. The problem only solved after I turn off the File System Sheild on Avast.
And torrent downloads are known for having malware included.
Torrent downloads are a bad idea. Even more so without the
file shield active. You are asking for nothing but trouble.
It depend on what you download/from where. A good example for a save torrent download is the Opera browser if you start the download from their website. btw, Opera has a torrent client build in, no need for a separate one. :D