Comodo FirewallComodo Firewall 
Comodo Firewall (cistray.exe). Comodo Firewall is a program that keeps you updated on all suspicious files.
Comodo Firewall delivers a robust, multilayer defense that far exceeds the Windows default firewall. Designed for users who want stronger real-time malware protection, cloud-based threat detection for PC, and the best free Windows security software experience, it offers advanced features without complexity or cost.
This intelligent firewall analyzes every new program and network connection, instantly determining whether it’s safe or potentially harmful. Unknown files can run safely inside a secure sandbox environment, preventing unwanted changes to your system. With accurate connection monitoring, powerful packet filtering, and cloud-assisted threat intelligence, Comodo Firewall blocks attacks before they can cause real damage.
Despite its advanced architecture, the interface remains clean, intuitive, and easy for beginners. It’s a complete, free solution that strengthens your system against hackers, malware, and suspicious activity while remaining simple to use.