Both replies are appreciated, thanks for helping me. I would rather do a weekly scan at least just to be safe, I am fairly paranoid and I am very active online, and even though I take a lot of other precautions I'd rather not be the victim of carelessness. Ever since I started using PeerBlock though neither avast o malwarebytes have picked up barely anything dangerous.
Sorry if I was a bit short, I had just got done erasing 6+ years of history and all that remains of it are a few essential backups, plus I spent 5 days after that trying to figure out what was wrong with my hardware... It happens, but it sucks when it happens to you. :/