Removing a software firewall
This section helps you with removing firewall software. As you install any third party firewall, it turns off the Windows firewall automatically. You can check this by clicking on the Firewall icon in Control Panel. If you have a third party firewall on your computer, you can always use the Add/Remove program to uninstall the firewall software. If your firewall software is a standalone firewall, you can easily get rid of it using the Add/Remove option. On the other hand, if the firewall is part of an Internet Security Suite, in the Add/Remove Programs, see if you can find the option Modify next to Remove. If the option is there, click on the button and uncheck the firewall before clicking on Next in the un-installation wizard. If there is no such option, you will have to remove the entire Internet Security Pack and reinstall again with Custom option. This will give you an option to uncheck the firewall so that the installer does not install the firewall with antivirus and antimalware.
Once you have removed the third party firewall, or if you do not have any third party firewall, your default Windows Firewall is active. You can deactivate it using the Firewall option in the Control Panel.
After you disable the Windows firewall, you need to run a registry scan for any leftover keys. You may use any of your preferred registry cleaners to check for invalid and leftover keys.
IMPORTANT: Though the article answers your question – how do I get rid of my firewall – I strongly recommend that you should use at least the default Windows firewall after removing a firewall, if you are not planning to install another firewall.