How to remove the autochk virus

Most antivirus programs identify autochk.dll as malware—for instance Kaspersky identifies it as Trojan-Spy.Win32.Agent.amjg or Trojan.Win32.Scar.heh, and TrendMicro identifies it as TROJ_AGENT.BBEJ or TROJ_OPACHKI.AE.

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

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Autochk.dll file information

The process known as lib or NoxzOES9 Application or Application appears to belong to software lib or Microsoft NoxzOES9 Application or Microsoft by Microsoft (

Description: Autochk.dll is not essential for Windows and will often cause problems. Autochk.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 24,064 bytes (40% of all occurrences), 22,016 bytes and 5 more variants. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The software starts upon Windows startup (see Registry key: MACHINE\Run). The autochk.dll file is not a Windows core file. The program has no visible window. The service has no detailed description. It can change the behavior of other programs or manipulate other programs. There is no description of the program. Autochk.dll is able to record keyboard and mouse inputs and manipulate other programs. Therefore the technical security rating is 79% dangerous, however you should also read the user reviews.

Recommended: Identify autochk.dll related errors

Important: You should check the autochk.dll 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

Seems to be a malware
  Elena   (further information)

Summary: Average user rating of autochk.dll: based on 1 vote with 1 user comment. One user thinks autochk.dll is dangerous and recommends removing it.

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Best practices for resolving autochk issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active autochk process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the autochk.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. 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.

Other processes

autochk.dll [all]