Disable the Firewall in Windows 10, 8, and 7
1. Open Control Panel.
You can do this a number of ways, but the easiest method is through the Power User Menu or the Start menu in Windows 7.
2. Select the System and Security link.
That link is only visible if you have the “View by:” option set to “Category.” If you’re viewing the Control Panel applets in icon view, just skip down to the next step.
3. Choose Windows Firewall.
Depending on how your computer is set up, it might instead be called Windows Defender Firewall. If so, treat every instance of “Windows Firewall” below as if it read “Windows Defender Firewall.”
4. On the left side of the Windows Firewall screen, select Turn Windows Firewall on or off.
5. Select the bubble next to Turn off Windows Firewall (not recommended).
You can disable the Windows Firewall for private networks only, just for public networks, or for both. To disable the Windows Firewall for both network types, you have to make sure to select ” Turn off Windows Firewall (not recommended)” in both the private and the public section.
6. Click or tap the OK button to save the changes.
Now that the Windows Firewall is disabled, you can continue the installation of your Craigslist Software and the validation process can succeed.