They're crap. They don't work. If you use Windows, you should make a rescue disk now, because if you get infected with malware, the only way to be sure you get rid of it is to format the hard drive and do a clean reinstall of the OS. Remember when a bunch of people got messages on SR saying that someone had recorded them getting drugs out of their mailbox, and they could view the video on some site? The site had a Java app that turned out to be malware. At the time, someone in our community clicked the Java app and got infected. He asked me what to do. I told him to format the hard drive and do a clean reinstall. He didn't listen to me, and instead spent 3 days removing the malware. Or so he thought. Today this person told me that he got the password reset for his SR account. I didn't know he had to reset his password, but he should have been suspicious from that alone, although he never mentioned it to me. When he logged in, all his BTC had been withdrawn. It was not a trivial amount of BTC. While talking to him, he rescanned his computer and found more malware. I experienced this myself when I infected a WinXP VM on purpose with the Trojan downloader on that site, "cleaned" it with an antivirus program, rebooted it and found the same rootkits. Since the malware came from someone targeting SR users, he got infected with it, and his account was later compromised, it is very like this is the thing that stole his login credentials. He adamantly denies it could have been a phishing site or other things, but in my experience, when people are 100% sure about something, that it absolutely could not have been something, most of the time they are wrong. Anyway, all this could have been avoided if he had done a clean reinstall.