You will need
- The possibility to log in to Windows with an account "Administrator".
Open the Windows control panel. To do this, click start, select settings, and then in the opened menu, select "control Panel".
Open the folder "Network connections". Look in control panel "Network connections" and double-click it with the mouse.
Display the properties dialog of the connection. In the window "Network connections" select the connection shortcut. Click right mouse button. In the context menu select "Properties". The Network connections folder may contain multiple connections. Some of them can be active and some disabled. Order to open port 80, it will be enough to do the following once, selecting one shortcut connection.
Open dialog of Windows firewall control. In the properties dialog of the connection switch to the "Advanced" tab. Click "Options".
Open the firewall exceptions list. To do this, switch to the Exceptions tab in the dialog control.
Open port 80. Click on the "Add port...". It is located under the firewall exceptions list. Display dialog "Add port". In the Name field, enter the name of the exception. In the future it will appear in the firewall exception list. In the field "port Number" enter the number 80. Click "OK" in the dialog "Add port". Click "OK" in the dialog "Windows Firewall".
Do not add Windows firewall exceptions if you are not sure of the necessity of this step. Some exceptions may jeopardize the safety of Your computer.
If system tray displays an icon of an existing connection, you can open the folder "Network connections" by clicking the right button and selecting "Open Network connections".