Activating the Windows 7 firewall
A firewall protects your computer from Internet worms that exploit open ports and operating system vulnerabilities. Only one firewall should be active on a computer.
If the Windows Security Center reports that your firewall is off, turn it on following these steps:
- Click Control Panel > System and Security > Windows Firewall.
- In the left-hand column, click Turn Windows Firewall on or off.
- Click Turn on Windows Firewall (in both network settings locations).
- Click OK.
- Close the Windows Firewall window.