What should I do if my Windows computer cannot access the Internet after the firewall is turned on?

First, find the firewall settings through "Control Panel" - "System and Security" - "Firewall".

Then, find the option "Allow apps through Windows Firewall Settings" under the firewall settings, and change "Core Network" to open in the allowed apps ( Put a check mark in front).

Finally, find "Check Firewall Status" under Firewall Settings, and find "Turn Windows Firewall on or off" and change " Remove the check mark in front of "Block all incoming connections, including apps in the allowed apps list".

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