System doctor is a fake anti-virus app, so it is actually Malware posing as an anti-virus app. (similar to Windows Police from a few years back). Some examples of fake alerts “System Doctor 2014 Firewall Alert System Doctor 2014 Firewall has blocked a program from accessing the Internet. Internet Explorer Internet Browser is infected with worm SVCHOST.Stealth.Keyloger. This worm is trying to send your credit card details using Internet Explorer Internet Browser to connect to remote host.” “System Doctor 2014 Warning Your PC is still infected with dangerous viruses. Activate antivirus protection to prevent data loss and avoid the theft of your credit card details. Click here to activate protection.” The best way to deal with bad apps like System Doctor 2014 is to install Malwarebytes which is the best and most sophisticated anti-malware software there is. Some of these malware are so bad that they actually try and prevent people from installing Anti-malware apps like Malwarebytes.  Yep, they actually block people from even visiting the REAL Anti-Malware or Anti-virus website. Another tip is to Locate  Google Chrome’s Privacy section and mark ‘Enable phishing and malware protection‘. It is also a wise idea to uninstall unknown or bad extensions in Chrome or Firefox.