demand scanners. Malwarebytes, trend micro housecall, esets. Also, if you are having a problem and suspect malware, you can run a 'live' repair disk. Avira, microsoft sweeper, and others. There's more to it, but that answers the question. Sorry for droning on. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @ Eric Doing a separate article for each AV product would be impractical. Most of them operate similarly. If you have questions regarding a specific program or suite, you could go to the manufacturer's site, or to Google. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I use Spybot Search & Destroy along with my McAfee. Spybot S&D works slick, and if it comes across and imbedded virus, it tells the inexperienced user that if they simply reboot their computer, Spybot S&D will automatically load itself first (thus mimicking running the program in Safe Mode) and eliminate the virus. Using Firefox and the realtime scanning of Spybot S&D, along with my McAfee and Windows Defender, seem to keep out just about anything that tries to get in. Spybot S&D is also free, asking only for a donation if you see fit to help them stay in business. Been using a paid for Avira for years in my main computer and use MalwareBytes for a second opinion. MalwareBytes is only launched for scanning. It's also behind a router. Seems to work well without slowing down my computer. The free Avira works well too but they flood you with popups so they can shove it. I'm switching to Microsoft Security Essentials. I'm running it on one