I had the same problem and Im not computer savy - however, with a bit of information gleaning from the forum and a bit of nous - I sorted it. I was using qtorrent which I uninstalled and downloaded utorrent instead. Go to Settings in the Avast user interface and then Components. In the Web Shield section, type utorrent as an exclusion then click ok. Open your secure line and find a P2P site like the Netherlands and connect. Your torrent download should work fine but a little slow. Hope this helps
Regards
Raxy