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    Help from Microsoft
    https://support.microsoft.com/article/ec0844f7-aebd-0583-67fe-601ecf5d774f

    Turn Microsoft Defender Firewall on or off

    1. Select Start , then open Settings  . Under Privacy & security  , select Windows Security > Firewall & network protection. 

    2. Select a network profile: Domain network, Private network, or Public network.

    3. Under Microsoft Defender Firewall, switch the setting to On. If your device is connected to a network, network policy settings might prevent you from completing these steps. For more info, contact your administrator.

    4. To turn it off, switch the setting to Off. Turning off Microsoft Defender Firewall could make your device (and network, if you have one) more vulnerable to unauthorized access. If there's an app you need to use that's being blocked, you can allow it through the firewall, instead of turning the firewall off.

    Note: If you get errors, or if the setting won't turn on, you can use the troubleshooter and then try again.
  2. People also ask
    How do I get help with Microsoft Defender?
    On Windows or Mac, select the  button near the top right of the window. On Android or iOS, tap your account avatar at the top left to find Help and feedback. Visit the Microsoft Defender community on Microsoft Answers! Want to ask, or answer, questions about Microsoft Defender?

    Getting started with Microsoft Defender - Microsoft Support

    support.microsoft.com
    What is Microsoft Defender?
    Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.

    Installing Microsoft Defender - Microsoft Support

    support.microsoft.com
    Does Windows 10 have antivirus?
    Windows Security is built-in to Windows and includes an antivirus program called Microsoft Defender Antivirus. (In early versions of Windows 10, Windows Security is called Windows Defender Security Center). If you have another antivirus app installed and turned on, Microsoft Defender Antivirus will turn off automatically.

    Stay protected with Windows Security - Microsoft Support

    support.microsoft.com
    Is Microsoft Defender Antivirus available in Windows 10?
    Platforms Microsoft Defender Antivirus is available in Windows 10 and Windows 11, and in versions of Windows Server. Microsoft Defender Antivirus is a major component of your next-generation protection in Microsoft Defender for Endpoint.

    Microsoft Defender Antivirus in Windows Overview

    learn.microsoft.com
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  3. Microsoft Support
    https://support.microsoft.com/en-us/topic/...

    Installing Microsoft Defender - Microsoft Support

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  4. Microsoft Learn
    https://learn.microsoft.com/en-us/defender...

    Microsoft Defender Antivirus in Windows Overview

  5. Microsoft
    https://www.microsoft.com/en-us/microsoft-365/...

    Microsoft Defender for Individuals | Microsoft 365

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