I've had viruses on my computer one time. It was terrible. I scanned my computer a few times and I used about four antiviruses. Unfortunately, I had to reinstall Windows after that, because no program could help me. Now, I use NOD32 and I think, that it is the best antivirus ever. It has got many options and it's find every virus or other trouble. So now my computer is safe and I'm very happy for that.