A firewall stops hackers from being able to access your computer. You need to run some sort of firewall!!! Comodo Firewall will close open ports on your computer, which stops hackers from being able to break in. Comodo Firewall has many advanced features, such as pop-ups that give you information on risks, component authentication that tests to see if your programs have been modified, and shutdown protection that prevents spyware from stopping the firewall. When you first run Comodo Firewall, be sure to click the "Security" button and run the "Scan for Known Applications" wizard that will scan your computer for thousands of known applications and will automatically assign access rules to them. Comodo Firewall will also alert you to programs that use other programs to access the internet. Be sure to take time and read the
manual.