How to open and close the Windows 7 system's own firewall

firewall can protect our computer from hackers on the network, the firewall function in windows7 system is powerful enough to protect our computer from harm. However, in various inadvertent operations or downloaded anti-virus software sometimes close or open the system's own firewall, then how do we open or close it?
Methods/steps
Click the Start menu to open the Control Panel Option.

Locate the Windows Firewall option in the Control Panel and click Open.

In the pop-up interface, if you find that the following picture shows, your firewall is closed. If you want to open it, please click the recommended setting.

This kind of windows firewall will open. If you click on the Windows Firewall in the Control Panel and find that the interface is like this, your firewall is open, you can close the window, but if you want to turn off the firewall, then click on the left column. Turn the Windows Firewall on or off option.

This kind of windows firewall will open. If you click on the Windows Firewall in the Control Panel and find that the interface is like this, your firewall is open, you can close the window, but if you want to turn off the firewall, then click on the left column. Turn the Windows Firewall on or off option.