TinyWall is a handy and non-intrusive firewall, easy to use by anyone. The program doesn't disturb you with notifications or alerts and its interface can be easily accessed through right click on the app's icon from the System Tray.
You can disable/enable it, allow/block all outgoing connections with a few clicks. Also, you can manually whitelist programs, processes or windows.
The access to TinyWall's configuration can be protected with a password to prevent unauthorized modifications, you can enable blocklist to block the access to malware websites.
The program is able to detect all installed programs and you can add them to the whitelist. If your PC is infected by a trojan or malware which attempt to connect and send data to third-party servers, it will be blocked, unless you allow it. You can use it in addition to your default antivirus program.
Pro: It has a lightweight and intuitive interface, it doesn't overwhelm you with pop-ups or tiring alerts.
Conclusion: It's very easy to use by anyone, you will stay protected and you'll not waste your time clicking on alerts or searching how to turn them off.
TinyWall is available as free download for Windows 32-bit and 64-bit.