This question could have been posted under several topics, but I'll start here. I'm trying to figure out how best to tell an average PC user how many scanners they need (but first I need to better understand this myself). Everyone knows about Anti-virus scanners and is hopefully running and keeping current a good application. However, I wrote Symantic and they don't detect all trojans and don't even start to look for Adware and Spyware. So I'm thinking I need to run five different scanners. 1. Virus (& worm) scanner 2. Trojan (& zombie) scanner 3. Adware scanner (i.e. lavasoft) 4. Spyware scanner (perhaps the same as adware scanner?) 5. Keylogger scanner (i.e. spycop) First, I ask this forum will I miss scanning for any other malware if I run the five scanners listed above. Are any of the five scanners combined in a single product? Can five scanners be combined in a single product? How is the best way to expalin the need for five scanners to an average PC user? Since I've learned of most forms of malware, virus doesn't top my list anymore as most serious (or should it still?). I understand a virus with a new signature is usually not detected until the signature is determined. A new virus also hits many users at once so empathy is shared. But this other malware is scary. Especially spyware/keyloggers. I read back in June that the Russian Mafia had installed Keylogger software on several public terminals at the University of Arizona (this was reported in Tech TV and I found several other articles on it so I don't believe it was a hoax). Summary: Does the average PC user need five scanners and what process (order and frequency of scanners) should be recommended by security practitioners?