Frequently Asked Questions

Check out our FAQ for installation and usage, purchases and license registration for AppCheck


Q. I want to remove the app check product.
AppCheck Anti-Ransomware can be removed normally by executing "AppCheck Anti-Ransomware" item registered in the program list of the control panel.
Q. After the uninstallation, I still can see RansomShelter backup folder <Backup (AppCheck)> remains.
After uninstalling AppCheck anti-ransomware, please locate and delete the RansomShelter backup folder created for each drive.
Q. "?:\Program Files\CheckMAL\AppCheck\mfc140u.dll" error occurs when executing and removing AppCheck.
Some users may experience the error "?:\Program Files\CheckMAL\AppCheck\mfc140u.dll" in the automatic update process.

If you encounter any of the above issues, please uninstall the app check and reinstall it to the latest version using the following procedure.

1) Execute "Command Prompt (Administrator)" and execute "sc stop AppCheck" and "sc stop AppCheckD" in command line in order.
* Note that if you run the in command prompt without administrator privilege, you will be denied access.

2) Run Task Manager and check if AppCheck.exe / AppCheckS.exe process is terminated.

3) Click the [Download Link] of mfc140u.dll file to download and extract the compressed file

4) Select the mfc140u.dll file that is appropriate for your operating system type (32/64 bit) and copy (Ctrl + C) the file to the "?:\Program Files\CheckMAL\AppCheck" folder Ctrl + V) to overwrite the existing file.

* Note that the PC with the folder "Program Files (x86)" is a 64-bit environment.
* x86: 32-bit / x64: refers to the 64-bit operating system.

5) Please visit the homepage ( and download the latest version of the app check file and reinstall it.

If you can not solve the problem or if you do not understand the above, please contact Customer Center and we will be able to assist you further through Remote Assistance.
Q. 웹 브라우저 실행 시 "컴퓨터에 D:\.DLL이(가) 없어 프로그램을 시작할 수 없습니다." 메시지가 생성됩니다.

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