What is avgntflt?

The genuine avgntflt.sys file is a software component of Avira Free Antivirus by Avira.
Avira Free Antivirus is a security program that protects computers against malware, viruses, spyware, trojans and computer worms. Avgntflt.sys is a filter driver that is required for Avira AntiVir Guard to function. This is not an essential Windows process and can be disabled if known to create problems. Avira Free Antivirus is a freely available security program for non-commercial or home use. The program features an antivirus scanner, PUA (potentially unwanted applications) shield, cloud protection technology and more. Avira Free Antivirus supports the Windows, Mac OSX, iOS and Android platforms. Avira Operations GmbH & Co. KG is a German company that develops antivirus software, applications for Internet security, privacy protection, as well as performance tools for multiple platforms. Avira was founded as H+BEDV Datentechnik by Tjark Auerbach in 1986 in Tettnang, Germany. The company launched the first instance of AntiVir, its first antivirus program in 1988, combating viruses found on MS-DOS systems. In 2006, the company changed its name to Avira after merging with its sister company, AntiVir PersonalProducts GmbH. Avira is currently headquartered in Tettnang, Germany.

AVGNtflt stands for Avira AntiVir Guard Network Minifilter Driver

Avgntflt.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 avgntflt.sys is a Windows system file or if it belongs to an application that you can trust.

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

Avgntflt.sys file information

The process known as Avira Minifilter Driver or AVIRA Minifilter Driver belongs to software Avira AntiVir PersonalEdition or Avira Product Family or AntiVir Workstation by Avira GmbH ( or Avira Operations GmbH & Co. KG.

Description: Avgntflt.sys is not essential for the Windows OS and causes relatively few problems. Avgntflt.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 55,640 bytes (16% of all occurrences), 84,744 bytes and 10 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. It is a Verisign signed file. The avgntflt.sys file is digitally signed. It is not a Windows core file. avgntflt.sys appears to be a compressed file. Therefore the technical security rating is 11% dangerous, however you should also read the user reviews.

Recommended: Identify avgntflt.sys related errors

If avgntflt.sys is located in a subfolder of "C:\Program Files", the security rating is 8% dangerous. The file size is 48,448 bytes (57% of all occurrences) or 52,032 bytes. The program is not visible. It is not a Windows core file. The file is a Verisign signed file. The file has a digital signature.

Uninstalling this variant: It is possible to uninstall Avira AntiVir PersonalEdition or Avira AntiVir Personal - Free software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7).

Important: Some malware disguises itself as avgntflt.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the avgntflt.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

es una archivo del antivirus avira en C windows-system32-drivers, en mi caso vi en visor de eventos de windows que estaba dañado, por eso pase el antivirus y reinstale avira, lo baje de nuevo de su web Pudo haberse dañado por un virus, un limpiador de registro o que se yo.
  Edgar Dulanto  
avgntflt is the driver used by Avira Antivir's resident virus scanner called Guard to scan on-access files
File version is filesize 56,816 bytes
  Dave /B00kwyrm  
Avira Premium Security, should be in c:\windows\system32\drivers\avgntflt.sys
gehört zu Avira dem Vierenprogramm!

Rating chart

Summary: Average user rating of avgntflt.sys: based on 7 votes with 6 user comments. 4 users think avgntflt.sys is essential for Windows or an installed application. 3 users think it's probably harmless.

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Best practices for resolving avgntflt issues

A clean and tidy computer is the key requirement for avoiding problems with avgntflt. 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 avgntflt.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

avgntflt.sys [all]