Turn Windows Firewall on

Open Windows Firewall by clicking the Start button , and then clicking Control Panel. In the search box, type firewall, and then click Windows Firewall.

In the left pane, click Turn Windows Firewall on or off. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

Turn Windows Firewall on or off link inWindows Firewall

Click Turn on Windows Firewall under each network location that you want to help protect, and then click OK.

If you want the firewall to prevent all programs from communicating, including programs that you have previously allowed to communicate through the firewall, select the Block all incoming connections, including those in the list of allowed programs check box.