Malware Defender 2015 is a fake antivirus program that tries to mimic a legitimate system security tool. However, Malware Defender 2015 is too annoying to consider it a useful computer defender application. Thus, you must understand that it is necessary to remove Malware Defender 2015 as soon as possible. If you tolerate this infection, it might end up crippling your computer to the point you will have to reformat your hard drive. Invest in a licensed antimalware tool to terminate Malware Defender 2015 and protect your system from similar threats.