I got a new brand computer last month as a present from my friends. They also installed me DSL Internet connection. Then a good friend installed me Torrent software for movie downloading. At the beginning, everything worked fine. Since yesterday, my Internet connection is slow and my PC is sending unknown email messages with a virus to all my friends. Do I have a virus?
You are probably infected with some sort of Downloader or Trojan virus. Its job is to aloud access to hard drive content on your computer to its owner. Those types of viruses are common on the Internet. Those emails it sends is its way for reproducing itself. I had to reinstall my Windows twice because of torrent using. That was at the beginning. However, from my personal experience I found out what to use for protection. The protection that I have been using for last six months is combination of AVG and Seagate firewall and I don't have any problems. Use AVG to clean all viruses from your computer and then, install Seagate firewall. I think you will be safe enough after that.