Learn how to enable or disable Microsoft Defender Firewall on Windows 11 or Windows 10. Find out why it's important to have it on and how to troubleshoot any issues.

Firewall & network protection in Windows Security lets you view the status of Microsoft Defender Firewall and see what networks your device is connected to. You can turn Microsoft Defender Firewall on or off and access advanced Microsoft Defender Firewall options for the following network types:

A firewall is what controls what is - and more importantly isn't - allowed to pass through those ports. You can think of it like a security guard standing at the door, checking the ID of everything that tries to enter or exit.

Automatically repair Windows Firewall problems, such as Windows fails to start Windows Firewall service (0x5) or Windows remote assistance is not working.

Find out the risks of allowing apps through Windows Defender Firewall and how to add or remove apps from the list of approved apps.

To turn Microsoft Defender Firewall on or off: Select Start , then open Settings . Under Privacy & security , select Windows Security > Firewall & network protection . Open Windows Security settings. Select a network profile: Domain network, Private network, or Public network.

When you try to change your Windows Firewall settings, the options are greyed out and you can't make any changes. To fix this, follow these steps: Click the Start button, then type Windows Firewall in the Search box.

Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by: Scanning the following QR code. Searching for Microsoft Defender in your app store. Sharing with your devices, the following link: Copy link.

For more info about Windows Security, see Stay protected with Windows Security. For more info about Microsoft Defender Firewall, see Turn Microsoft Defender Firewall on or off. For help with your password, see Change or reset your Windows password.

Turn Windows Security on or off. When you get a new device and start up Windows 10 for the first time, the antivirus protection that comes installed with the device is your default security app. However, Windows Security is pre-installed and ready for you to use at any time.