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2. Turn Microsoft Defender Firewall on or off

   support.microsoft.com/en-us/windows/turn-microsoft-defender-firewall-on-or-off...

   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. To turn it off, switch the setting to Off.

3. Automatically diagnose and fix problems with Windows Firewall

   support.microsoft.com/en-us/windows/automatically-diagnose-and-fix-problems...

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

4. Turn Microsoft Defender Firewall on or off - Microsoft Support

   support.microsoft.com/en-au/windows/turn-microsoft-defender-firewall-on-or-off...

   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. To turn it off, switch the setting to Off.

5. Firewall & network protection in Windows Security

   support.microsoft.com/en-gb/windows/firewall-network-protection-in-windows...

   You can turn Microsoft Defender Firewall on or off and access advanced Microsoft Defender Firewall options for the following network types: Domain (workplace) networks. Private (trusted) networks. Public (untrusted) networks. If you want to change a setting, select the network type you want to change it on.

6. Windows Firewall settings are greyed out - Microsoft Support

   support.microsoft.com/en-us/topic/windows-firewall-settings-are-greyed-out-b3b...

   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.

7. Stay protected with Windows Security - Microsoft Support

   support.microsoft.com/en-us/windows/stay-protected-with-windows-security-2ae...

   Firewall & network protection - Manage firewall settings and monitor what’s happening with your networks and internet connections. App & browser control - Update settings for Microsoft Defender SmartScreen to help protect your device against potentially dangerous apps, files, sites, and downloads.

8. Add an exclusion to Windows Security - Microsoft Support

   support.microsoft.com/en-us/windows/add-an-exclusion-to-windows-security...

   Go to Start > Settings > Update & Security > Windows Security > Virus & threat protection. Under Virus & threat protection settings , select Manage settings , and then under Exclusions , select Add or remove exclusions .

9. Connect to a VPN in Windows - Microsoft Support

   support.microsoft.com/en-us/windows/connect-to-a-vpn-in-windows-3d29aeb1-f497...

   Connect to a VPN from the Windows Settings page: Select Start > Settings > Network & internet > VPN . Next to the VPN connection you want to use, select Connect .

10. “0x8007042c” error message when you try to start Windows Firewall...

    support.microsoft.com/en-us/topic/-0x8007042c-error-message-when-you-try-to...

    When you try to start Windows Firewall, you receive the following error if the Firewall service is disabled or if your computer is infected with malware: 0x8007042c. Resolution. To resolve this issue, scan for and remove malware by following the steps in Method 1.

11. Risks of allowing apps through Windows Defender Firewall

    support.microsoft.com/en-us/windows/risks-of-allowing-apps-through-windows...

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