User is asked to choose between the basic installation (Firewall Only), the advanced version (Firewall with Optimum Proactive Defense) or the option with maximum use of the options Defence+ has got to offer (Firewall with Maximum Proactive Defence+). The basic Firewall notably limits the number of pop-ups because Comodo will only check the internet activities, which is safe enough for most users. For monitoring the activities of the installed application, it is necessary to select the option Firewall with Optimum Proactive Defense or Firewall with Maximum Proactive Defence+. Be aware that choosing for these options will result in notable more pop-ups to be answered! In the next steps of this manual describes the settings for the Firewall with Optimum Proactive Defense.
The Defense+ component of Comodo Internet Security is a host intrusion prevention system that constantly monitors the activities of all executable files on your PC. With Defense+ activated, the user is warned EVERY time an unknown application executable (.exe, .dll, .sys, .bat etc) attempts to run. The only executables that are allowed to run are the ones you give permission to. An application can be given such permission to run in a variety of ways including; manually granting them execution rights in Computer Security Policy; by deciding to treat the executable as trusted at a Defense+ alert or simply because the application is on the Comodo safe list. Defense+ also automatically protects system-critical files and folders such as registry entries to prevent unauthorized modification. Such protection adds another layer of defense to Comodo Internet Security by preventing malware from ever running and by preventing any processes from making changes to vital system files.
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