Malware Defense is a software package that displays itself as a legitimate antivirus tool.
It has been created to get you to purchasing the upgraded version of the application by showing you a series of false errors which are meant to be caused by a series of fictitious viruses on your system.
Unfortunately, this software does not have any legitimate scanning capabilities to remove viruses from your PC and has been created mainly to scare you into buying the upgraded version, making money for the creators of the program.
It's like a car that cannot be refilled after the tank is emptied.
How Malware Defense Infected Your PC This is a software tool that comes into systems on the back of other legitimate programs and claims.
The two main ways that it infects your computer is to either show itself as a legitimate antivirus tool or to just download & install itself with another file / program.
The fact is that you can get this infection from a wide range of different sources, but there's only one effective way to remove it for good.
How To Remove Malware Defense To remove this infection, you need to work smart.
There's a simple routine that you can use to remove the various parts of this tool that will allow you to quickly remove it from your computer forever.
This method is quite simple and is as follows:

• Stop the program from running by killing its processes
• Remove its program files from your PC (stops it working again)
• Remove any components it installs on your system
• Remove any registry keys that it installs on your PC (stops it from coming back)

This simple method is the way that uninstaller features work, and is how you should remove this infection.
It basically works by removing all the parts of this virus that it needs to run and then stops it from coming back.
However, in order to perform this operation without ruining your PC, it' vital that you are able to find and remove all the correct files.