System Defender is a rogue antivirus application that pushes itself to users through the use of scary popups and attack sites. The software, once it is installed will create numerous files and then claim that they are infected with viruses and they need to be cleaned. Of course, they cannot clean them up if you don’t pay for the software. When the software is running it will also bombard users with popups pushing them to purchase and a falsified Windows Security Center claiming that you need to activate System Defender. You are best off not financing these rogues. Read on for how to remove system defender: