Windows 11 Microsoft Defender Firewall: I can't turn on the Defender Firewall, error message is: This setting is managed by your administrator

[JC_H]

Hello,I am running a Lenovo Thinkpad T480 under Windows 11 latest update, i.e. 2022-04 Cum Update. I use Windows Defender antivirus and I would like to turn on Microsoft Defender Firewall. However, the option to turn it on is greyed out and I have an error message : "This setting is managed by your administrator". My machine is not part of a network, It is a standalone machine and I am the only user and the administrator user. I searched through The Microsoft community and the Microsoft suuport sites and could not find any match to fix this issue, i.e. Windows11 and Defender Firewall. Lots of

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