Windows System Defender is a misleading security application that gives false reports of threats on your computer to make you think your PC is badly infected with malware. The rogue application is from the same family as Windows PC Defender and Windows Protection Suite. When running, it will prompt you to pay for a full version of the program to remove the threats which do not even exist. Do not purchase this malware and uninstall Windows System Defender from your PC as soon as possible.
Once Windows System Defender is installed, it performs the following actions:
- Creates a startup registry entry so that it executes whenever Windows starts
- Modifies Windows Hosts file, blocks access to certain security websites
- Produces outbound traffic
- May request other malicious files from the Internet
Another interesting thing is that the program supposedly removes several infections for free. You have to pay if you want to remove all infections. What is more, WindowsSystem Defender will constantly display fake security alerts and notifications from Windows Task bar. The fake notification states:
malicious applications, which can contain trojans, were found on your PC and need to be immediately removed. Click here to remove these potentially harmful items using Windows System Defender.
Pop-up message in System Tray

Windows System Defender will also impersonate Windows Security Center and state that your computer is unprotected. It will suggest you to active Windows SystemDefender in order to ensure full system protection. However, please note that the legitimate one does not promote any anti-virus software, that's the main difference. The misleading application, will block certain security software too. If you find that your computer is infected with this malware, please use the removal guide below to remove Windows System Defender manually for free. We also recommend you to scan your computer with a reputable and legitimate anti-spyware application. If you have inadvertently purchased this program, please contact your credit card company immediately.
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