How can I be sure that Windows Firewall is on?

Windows Firewall is on by default in this version of Windows. To make sure it has not been turned off, follow these steps:

  1. Open the Windows Firewall.

  2. Click Turn Windows Firewall on or off. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

  3. Click On (recommended), and then click OK.

Note: This information provided by Microsoft.