How to Fix AppVEntSubsystemController.dll Missing Error (Solved)

What is AppVEntSubsystemController.dll?

AppVEntSubsystemController.dll is a Dynamic Link Library (DLL) file that plays a crucial role in the Windows operating system. This particular DLL file is associated with Microsoft’s Application Verifier, a tool used for debugging applications to ensure they are error-free and follow best practices when interacting with the operating system.

Why is AppVEntSubsystemController.dll missing?

There could be several reasons why AppVEntSubsystemController.dll might be missing from your Windows system. Common causes include malware infections that delete essential system files, accidental deletion by users, or corruption due to improper system shutdowns.

Step-by-Step Fixes:

Method 1: Reinstall Visual C++ Redistributable

Visual C++ Redistributable packages often contain the necessary DLL files, including AppVEntSubsystemController.dll. To reinstall these packages, follow these steps:

1. Visit Microsoft’s Visual C++ Redistributable download page.
2. Download the appropriate version for your system (x64 or x86) and install it.

Method 2: Run SFC /scannow command

System File Checker (SFC) is a built-in Windows tool that scans for and repairs missing or corrupted system files. To run the SFC command, follow these steps:

1. Press Windows key + X and select Command Prompt (Admin) or PowerShell (Admin).
2. Type the following command and press Enter:

sfc /scannow
    

Method 3: Update System Drivers

Outdated system drivers can cause problems with various components, including DLL files. To update your system drivers, follow these steps:

1. Press Windows key + X and select Device Manager.
2. Locate the device for which you want to update the driver. Right-click on it, and then click Update Driver.
3. Select Search automatically for updated driver software.

Conclusion

By following the step-by-step fixes outlined above, you should be able to resolve the AppVEntSubsystemController.dll missing error in your Windows system. If the issue persists, consider performing a clean boot or reinstalling your operating system as potential solutions.