The Windows firewall is enabled by default, but if you want to mess around with the settings, here's how.

If Windows Defender Firewall is connected, it should say "Connected" as shown above. However, if it's not connected, click "Use Recommended Settings" to turn it on.

Step 1: Open Windows Defender Firewall Press the Windows key on your keyboard, type firewall in the search menu, and click on "Windows Defender Firewall with Advanced Security".

Does the Windows firewall protect your computer sufficiently? What contribution does your router make -- and who needs additional security software? This article explains.