Developed by Symantec Corporation, sysfer.dll is the process file for Symantec CMC Firewall usually located in C:\Windows\System32. CMC Firewall protects the computer against harmful elements such as viruses, Trojan horses, Worm, and other threats. Also called Teefer2, CMC Firewall is based on the technology that was developed by Sygate Technologies, which was later purchased by Symantec Corporation. Sygate Technologies was a security software company whose main products include enterprise server, end user firewalls, network security enforcement, automated network discovery for enterprises, and several security monitoring software. The Teefer2 driver captures all incoming and outgoing network traffic in a particular interface and these network packets pass through the firewall component working with the associated miniport driver. Then it runs under kernel mode, and it passes information to the teefer.dll under user mode operations. Its endpoint incorporates the rules-based firewall, an anti-malware technique which Symantec calls its generic exploit blocking. The technique proactively blocks malware to stop exploiting unpatched vulnerabilities.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. sysfer.dll. is used by Symantec , If you shut down sysfer.dll, it will likely start again at a later time either after you restart your computer or after an application start. To stop sysfer.dll, permanently you need to uninstall the application that runs this process which in this case is Symantec , from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed sysfer.dll

A process usually a part of an installed application such as Symantec , or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if sysfer.dll. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that sysfer.dll, belongs to, in this case Symantec