So I've been very careful when it comes to scketch sites and such on the internet and in downloads. Unfortunately last night my keyboard stopped working and wouldn't come back on till I rest my computer. When it rest a blue screen appear very quickly and I couldn't see what was on the screen unfortunately. Windows booted back up and notified me that it recovered from a crash. I ran virus scans with malwarebytes and avast and got no threats on either. Now I'm paranoid because I using a very expensive machine and I really don't want virus on board. What can I do to protect myself? What can I do to insure no viruses remain? If I get torrents how can I safely download those or anything like that anonymously and safely? I'm running windows 7 ultimate. Please help me out so I can stop worrying. There is a ton of valuable data I can't lose or want to spend the time reinstalling from backups. Thank you!