So I did a scan with Hitman Pro and found this: trojan.win32.agent.zyeb. My Hitman Pro license expired, and Malwarebytes Anti Malware, SuperAntiSpyware, and Avast! didn't detect it. Yes, I update before scanning, and I rescanned, but could not find anything. I figured it was from Winrar, so I went to my downloads folder, got rid of it, did another scan with Hitman, and it was gone. Did the trojan let me off that easy? I have a feeling something is left behind, like a hidden file or something.