Enable and Disable Windows Firewall Quickly Using Command-Line

Enabling Windows Firewall
Click Start, Run and type:
Netsh firewall set opmode enable
Disabling Windows Firewall
Click Start, Run and type:
Netsh firewall set opmode disable
Windows Firewall status can be verified using Windows Security Center or the Windows Firewall applet.
Note: In Windows Vista you need to run the above commands from an elevated Command Prompt. To open an elevated Command Prompt, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
You may create desktop two shortcuts to enable and disable the Windows Firewall. To run the commands as administrator, right-click on the shortcut and choose Run as administrator. Or right-click the shortcut properties, click Advanced and tick the Run as administrator checkbox and click OK. Double-clicking the shortcut run the Netsh… command elevated, after you click the Continue button in the UAC confirmation dialog.
Customize the shortcut icons by picking an appropriate icon from Shell32.dll, Imageres.dll or from xpsp2res.dll (for Windows XP) for easy identification.