Long story. When I tried to download the Star Wars Despecialized Edition at one of the popular torrent sites, it gave my computer a virus.
Did you download the torrent software you used for downloading from that torrent site (through what would actually have been a malicious advertisement rather than a real download)? That’s the only way I could see that happening if it was a popular torrent site. If it was some fly-by-night one that just copies the torrent titles from real sites and makes it so every download is a virus, that’s another story.