When you click on Public network, the following panel will become visible. Toggle the Windows Defender Firewall switch to the Off position. Do the same for Domain network and Private network as well.

Windows Security will send notifications with critical information about the health and security of your device. You can specify which informational notifications you want. By default, you will be ...

Disabling Windows Defender permanently on Windows 11 is not recommended, and somewhat challenging. However, you can temporarily turn off real-time protection if it's blocking you from doing something.