What is mfeavfk?

The genuine mfeavfk.sys file is a software component of SYSCORE by McAfee LLC.
"Mfeavfk.sys" is McAfee's "Anti-Virus Filter Link driver," part of SYSCORE, a common group of ".sys" drivers and ".exe" processes used by McAfee For Enterprise cybersecurity products, including VirusScan Enterprise (VSE). It installs in "C:\Windows\System32". Stopping or uninstalling SYSCORE processes can cause serious problems. Certain ones automatically restart because malware often tries to kill them. Consult McAfee or system administration. McAfee's description of its functions for VSE 8.7i is "anti-virus scanning". VSE 8.8 adds "maintaining a file cache". "Filter drivers" are kernel-level drivers that become part of the Microsoft executive through the Microsoft Filter Manager. This is how McAfee can do On-Access virus scans automatically when files are opened or closed. Note that file backup or encryption products also use this technology and certain products can conflict and corrupt files. McAfee LLC is the world's largest dedicated cybersecurity technology company. Intel holds 49% ownership.

MFEAVFk stands for McAfee For Enterprise Anti-Virus File Link Filter Driver

Mfeavfk.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if mfeavfk.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for mfeavfk drivers in need of updating

Mfeavfk.sys file information

The process known as McAfee Inc. mfeavfk or Anti-Virus File System Filter Driver belongs to software SYSCORE or SYSCORE. by McAfee (

Description: Mfeavfk.sys is not essential for the Windows OS and causes relatively few problems. Mfeavfk.sys is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/8/7/XP is 91,672 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. It is a Verisign signed file. The file has a digital signature. There is no detailed description of this service. Mfeavfk.sys is not a Windows system file. mfeavfk.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous; however you should also read the user reviews.

Uninstalling this variant: If you encounter difficulties with mfeavfk.sys, you may also ask the software vendor,, for advice or safely remove the program using the uninstall program of McAfee, Inc. (Control Panel ⇒ Uninstall a Program).

Recommended: Identify mfeavfk.sys related errors

Important: Some malware disguises itself as mfeavfk.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the mfeavfk.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Bis auf die obige Info nichts, leider. Bei wiederholtem AVG-Virenscan gibt es immer den Hinweis auf diesen versteckten Treiber. Ich habe kein Programm von McAfee installiet, kann also auch n ichts deinstallieren. Mich nervt dieser stete Hinweis. Was kann man tun?
  U. Voepel  
ich nehme fast an, dass AVG diesen "Fehler" selbst einsteuert. Habe einen Scan-lauf gemacht, den Fehler gesichertn Neustart wie gefordert und sofort einen neuen Scan gestartet mit gleichem Ergebnis. Malwarebytes Anti-Malware fand nichts.

2 users don't grade mfeavfk.sys ("not sure about it").

Do you have additional information? Help other users!

Best practices for resolving mfeavfk issues

A clean and tidy computer is the key requirement for avoiding problems with mfeavfk. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the mfeavfk.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

mfeavfk.sys [all]