> I think you are talking about spyware that is brought into the browser? You may be right. I would expect most of the stuff is IE related or websites that trick users to install some executable. > There are many types of malware. Viruses and Trojan Horses are two of them. > Can you specify what type of malware you are talking about? > When trying to disinfect windows machines typically windows XP based I see a lot of rootkits and other malware that ClamWin and other antivirus only products do not detect at all. I believe this is mainly because the applications do not spread by embedding themselves to other executables but more by tricking the user, or system to install. I also see malware that is designed to defeat symantec and other antivirus software opening up the entire system to many other infections. A lot of this is however caused by the user. In the nearly 20 years I have used windows I have never infected my pc with a single virus. However I know people that have to run multiple protections and still can't keep from getting their systems infected. Lucky for them I am available to clear up the mess... John