Avsecurity.exe is a malicious process related to Internet Security 2013 rogue antispyware program. You cannot end or stop it through the Task Manager. Internet Security virus will report Task Manager legitimate Windows utility as infected with W32/Blaster.worm threat. The same problem happens when you try to launch all other decent programs like legitimate antiviruses, the majority of browsers, system utilities like cmd.exe or taskkill.exe. As you see, it is very difficult to stop avsecurity.exe, however, this is what should be done to make it possible for users to remove Internet Security virus from their computers.