What Is sysfer.dll? Is It A Virus Or Malware?

What is sysfer.dll?

sysfer.dll is an dll file which belongs to the process Symantec CMC Firewall sysfer which comes with the Software Symantec CMC Firewall developed by software developer Symantec

The .dll extension of the sysfer.dll file specifies that it is a Dynamic-link library file.

Malware and viruses are also transmitted through dll files. So we must be sure before opening any unknown dll file on our computers.

We will check if the sysfer.dll file is a virus or malware? Whether it should be deleted to keep your computer safe? Read more below.

Is sysfer.dll safe to run? Is it a virus or malware?

Let’s check the location of this dll file to determine whether this is a legit software or a virus. The location of this file is

File Location / Danger rating : 41% dangerous

To check whether the dll file is legit you can start the Task Manager. Then click on the columns field and add Verified Signer as one of the columns.

Now look at the Verified Signer value for sysfer.dll process if it says “Unable to verify” then the file may be a virus.

File Name sysfer.dll
Software Developer Symantec
File Type
File Location 41% dangerous
Software Symantec CMC Firewall


sysfer.dll is a Virus or Not : sysfer.dll is not a Virus

If the developer of the software is legitimate then it is not a virus or malware. If the developer is not listed or seems suspicious you can remove it using the uninstall program.


How to Fix sysfer.dll Errors

To fix missing sysfer.dll file you can perform a system restore to restore all missing dll files on your system.

If the system restore didn’t fix the dll issue then you can run System File Checker to fix corrupt dll files on your Windows system.

How To Remove or Uninstall sysfer.dll

To remove sysfer.dll from your computer do the following steps one by one.

  1. If the dll file is a part of a software program or game then it will also have an uninstall option. Then you can run the uninstaller located at directory like C:>Symantec>Symantec CMC Firewall sysfer orSymantec CMC Firewall >sysfer.dll_uninstall.dll
  2. Or the sysfer.dll was installed using the Windows Installer then to uninstall it Go to System Settings and open Add Or Remove Programs Option.
  3. Then Search for sysfer.dll or the software name Symantec CMC Firewall in the search bar or try out the developer name Symantec.
  4. Then click on it and select the Uninstall Program option to remove sysfer.dll file from your computer. Now the software Symantec CMC Firewall program along with the file sysfer.dll will be removed from your computer.

I hope you were able to learn more about the sysfer.dll file and how to remove it.

Let us know in the comments below if you face any other sysfer.dll issues.

About The Author: Gowtham V is a tech blogger and founder of HowToDoNinja.com who is an expert in Technology & Software and writes awesome How-To Tutorials to help people online. He has 5 years of experience in creating websites and writing content. He uses a Windows PC, a Macbook Pro, and an Android phone. Check out more about our website and our writers on our About US page. Also follow me on Twitter page and Linkedin

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