How to remove the ChkDisk virus

Most antivirus programs identify ChkDisk.dll as malware—e.g. Microsoft identifies it as Trojan:Win32/Opachki.A or TrojanSpy:Win32/Dalls.A, and TrendMicro identifies it as TROJ_AGENT.BBEJ or TROJ_OPACHKI.A.

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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ChkDisk.dll file information

The process known as lib or Application belongs to software lib or Microsoft by Microsoft (

Description: ChkDisk.dll is not essential for Windows and will often cause problems. The file ChkDisk.dll is located in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 24,064 bytes (50% of all occurrences), 22,016 bytes, 40,960 bytes or 23,552 bytes. 
The program has a visible window. The process has no file description. The application starts upon Windows startup (see Registry key: User Shell Folders). The file is not a Windows system file. ChkDisk.dll is able to record keyboard and mouse inputs and manipulate other programs. Therefore the technical security rating is 34% dangerous, however you should also read the user reviews.

Recommended: Identify ChkDisk.dll related errors

Important: You should check the ChkDisk.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

Ist erschienen, als ich mir einen virus eingefangen hab... Also vorsicht !!!

Summary: Average user rating of ChkDisk.dll: based on 1 vote with 1 user comment. One user suspects danger.

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Best practices for resolving ChkDisk issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active ChkDisk process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the ChkDisk.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 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.

Other processes

ChkDisk.dll [all]