What is avscan.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the avscan.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Avscan.exe file information

Windows Task Manager with avscan
Avscan.exe process in Windows Task Manager

The process known as Workstation On-Demand Scanner or On-Demand Scanner or Avira OnDemand File Scanner or Avira On-Demand Scanner

belongs to software Avira AntiVir Personal - Free or Avira Product Family or Avira Free Antivirus or Avira AntiVir Personal - Free Antivirus

by Avira GmbH ( or Avira Operations GmbH & Co. KG or Guidance Software (

Description: Avscan.exe is not essential for the Windows OS and causes relatively few problems. Avscan.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 466,689 bytes (28% of all occurrences), 315,649 bytes and 15 more variants. 
Avscan.exe is not a Windows system file. Avscan.exe is able to monitor applications. Therefore the technical security rating is 19% dangerous, however you should also read the user reviews.

Uninstalling this variant: It is possible to do the following:
  1) uninstall the associated program (Start > Control Panel > Uninstall a Program > Avira AntiVir Personal - Free or Avira Antivirus)
  2) contact Customer Service [1][2]
  3) update [1][2] the program to the latest version.

Recommended: Identify avscan.exe related errors

If avscan.exe is located in the C:\Windows\System32 folder, the security rating is 63% dangerous. The file size is 327,680 bytes (50% of all occurrences) or 427,331 bytes. There is no information about the author of the file. It is not a Windows system file. Avscan.exe is able to monitor applications, hide itself and manipulate other programs.

External information from Paul Collins:

Important: Some malware camouflages itself as avscan.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Trojan Horse (detected by Symantec), and Backdoor.Win32.Rbot.aebh (detected by Kaspersky). Therefore, you should check the avscan.exe 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

avscan.exe wird vom Antivirenprogramm avira benutzt, wenn ein Systemscan durchgeführt wird.
  MdC   (further information)
I want to void my subscription
  Ronald Herbert  
avscan.exe is part of Antivirus Soft (Malware)
Ist der Virenscanner von Avira, keinesfalls löschen! Für die Sicherheit notwendig.
I have Avira Anti Virus Free on my XP pro. The avscan.exe file is 992KB in C:\Program Files\Avira\AntiVir Desktop - folder. When showing 'avscan.exe' SYSTEM CPU around 5-55% (peaking occassionally at CPU 85%) it does not seem to cause a problem. My keyboard and programs like IE become unresponsive when it peaks at 98-99%. (while typing this my keypresses are buffered and eventually - about 10 seconds later get typed!) Access is denied if I try to stop the process/process tree in 'Windows Task Manager'. Stopping 'Luke Filewalker' the mini screen that displays the progress of the Avira Computer Scan restors the keyboard and programs to their responsive state. Avira has a 'scan priority' setting; access from Avira window. Clicking on the 'gear wheel' icon next to the 'scan system' tab icon allows the priority to be changed. Reducing this from 'high' to 'low' stops this problem. Note also that the box for 'stopping' the scan is best 'ticked' until you are happy with your settings - since the Avira system wants to prevent high-jacking (as do all Anti Virus programs) you can't intervene in a scan unless you set this box as ticked, the same for a hacker. Not sure if help is for free version - but link given below.
  Keith   (further information)
avscan.exe ist zwar notwendig aber auch CPU raubend.
Dat is ein gans dolles Program

Rating chart

Summary: Average user rating of avscan.exe: based on 9 votes with 7 user comments. 6 users think avscan.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users think avscan.exe is dangerous and recommend removing it. One user is not sure about it.

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Best practices for resolving avscan issues

A clean and tidy computer is the key requirement for avoiding problems with avscan. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the avscan.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

avscan.exe [all]