How to Fix amsi.dll Missing Error (Solved)

What is amsi.dll?

amsi.dll, or Application Identity Services Module Integrity, is a Dynamic Link Library (DLL) file in Microsoft Windows operating systems. This essential system component helps with application identity verification, enhancing the overall security of your system by scanning applications for threats and malicious activities.

Why is amsi.dll missing?

The amsi.dll error can occur due to various reasons, such as:

• Malware infections that may delete or corrupt system files.
• Accidental deletion during system maintenance or software uninstallation processes.
• Outdated Windows system or missing components required for the amsi.dll file.

Step-by-Step Fixes:

Method 1: Reinstall Visual C++ Redistributable

The missing amsi.dll file can sometimes be a result of the Visual C++ Redistributable package not being properly installed or corrupted. To resolve this issue, reinstall the Visual C++ Redistributable packages:

• Visit the Microsoft Download Center at https://www.microsoft.com/en-us/download/details.aspx?id=40784.
• Download the appropriate Visual C++ Redistributable package for your Windows version and architecture (x64 or x86).
• Run the downloaded installation file and follow the on-screen instructions to complete the installation process.

Method 2: Run SFC /scannow command

Running the System File Checker (SFC) scan can help repair corrupted system files, including amsi.dll. Here’s how:

• Press Windows key + X and select “Command Prompt (Admin)” or “PowerShell (Admin)” from the menu.
• Type `sfc /scannow` in the command line and press Enter.
• Follow the on-screen instructions to complete the SFC scan process.

Method 3: Update System Drivers

Outdated or missing drivers can also cause the amsi.dll error. To update system drivers:

• Press Windows key + X and select “Device Manager” from the menu.
• Expand the device categories to locate the problematic driver.
• Right-click on the driver and select “Update Driver” > “Search automatically for updated driver software.”

Conclusion

With these methods, you should be able to resolve the amsi.dll missing error in your Windows system. If none of the solutions work, consider seeking help from a professional technician or reaching out to Microsoft Support for further assistance.