System Defender (System Defender virus, SystemDefender) is a rogue Microsoft Windows security program in the FakeVimes family of computer infections. System Defender masquerades as a legitimate Windows security product; However, System Defender is detected as malware by reputable security vendors, partly because it is known to manufacture non-existent security threats in order to scare computer users into activating and purchasing the fraudulent software.
When a computer becomes infected with the System Defender virus, the fake Windows Antivirus program will initiate a bogus computer scan that will result in numerous non-existent threats. The program may also claim that Windows is unable to delete all found threats and recommended antivirus software must be used. This is a scare tactic used by System Defender malware to frighten computer users into activating and purchasing the fraudulent product for “real-time protection.”
The System Defender virus blocks and restricts access to internet connection and can block legitimate programs used to eradicate it, as well as block applications such as Windows Task Manager that can be used to end the malicious process. It will usually terminate these programs and applications and will display a notification or message stating that the program has become infected.
How to remove System Defender
Remove System Defender virus in 2 easy steps with this free System Defender removal guide. Get rid of the System Defender malware and other malicious programs using each step provided on this webpage.
Step 1: Scan your computer for System Defender malware
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2. Install the free or full version of Malwarebytes Anti-Malware. The full version enables real-time protection to block malware and unwanted programs from infecting your computer, while the free version is just a free scan and removal tool.
3. Run Malwarebytes Anti-Malware after install. Malwarebytes may automatically begin to update and scan your computer at this point.
4. Click the large Scan Now button or visit the “Scan” tab to manually perform a scan once the Anti-Malware program has opened. Before the scan is started Malwarebytes may ask to update the software, make sure to do so if prompted to.
5. When the malware scan is complete, click the Quarantine All button to isolate and remove the detected files. You may be asked to reboot your computer after removal to completely remove detected files.
6. You can additionally chose to visit the History tab and click Delete All to remove these files from the Quarantine log, although these files no longer provide a threat.
Step 2: Cleanup and repair settings
CCleaner can be used to automatically repair internet browser settings that have been changed during this infection. It can also fix system startup up settings, Windows Registry, and help uninstall unwanted software.
1. Install the free or full version of CCleaner by Piriform.
2. Once installed, open the program and navigate to Cleaner > Windows/Applications and click the Analyze button. Afterwards, click the Run Cleaner button on the bottom right of the program interface.
3. Next, navigate to Tools > Startup and search through each tab starting from windows, internet explorer, etc., all the way to Content Menu, for additional suspicious entries and click Disable and Delete once anything is found.