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How to enable Microsoft Defender On Windows 10 or 11

Microsoft Defender is a component of Windows 10 and 11 that provides comprehensive, built-in and ongoing security protections. It features an anti-virus, anti-malware, firewall and more, to keep your personal computer safe.

Learn more about Microsoft Defender from the vendor’s website.

NOTE: Microsoft Defender cannot be enabled when another anti-virus is installed, e.g.: Trend Micro Antivirus

To enable Windows Defender

1. Click the windows logo mceclip0.png in the bottom left corner of the screen. The Start menu will pop up.
2. Scroll down and click Windows Security to open the application.


3. On the Windows Security screen, check if any antivirus program has been installed and running in your computer.
Defender2.jpg Green tick: An antivirus program is present and running in your computer. Enabling of Windows Defender is not necessary as your computer is protected by Windows Defender.
 Defender3.jpg No tick: No antivirus present and Windows Defender is not enabled in your computer. Please proceed to next step to enable Windows Defender, to keep your personal computer safe.

4. Click on Virus & threat protection as shown


5. Next, select Virus & threat protection icon


6. Turn on for Real-time protection