klones calamitas theory

When it comes to running two antiviruses on the same machine it is a bad idea. The reason behind it is this, they will see each other as a potential threat, and will attempt to remove each other. They will actually battle over who gets to actually stops and quarantine a virus, which will result in an endless battle and making it seem that your system will have a virus which will go on forever until you remove one or the antivirus application. And finally they will drain your resources and possibly wipe out your system altogether.