Windows+Ports+usage

For Windows Product Activation to succeed, configure firewalls or other devices that are between the client and the Internet to allow traffic to pass over ports 80, and 443.
 * Windows Ports usage **

You can use Microsoft Internet Explorer or other Internet browsers to test connectivity through these ports.

2.Type http://www.microsoft.com:80 in the Address bar, and then press ENTER. 2.Type https://www.microsoft.com:443 in the Address bar, and then press ENTER. If you can access the Microsoft Web site each time, ports 80 and 443 are accessible.
 * __To test__** whether port 80 is open: 1.Open Internet Explorer.Type http://www.microsoft.com:80 in the Address bar, and then press ENTER.
 * __To test__** whether port 443 is open: 1.Open Internet Explorer.Type https://www.microsoft.com:443 in the Address bar, and then press ENTER.

If your browser displays an error message such as "connection timed out," the corresponding port may be blocked.

Link for details:- []