authz.dll: download the file and fix the error

Windows system file Scanned by antivirus

authz.dll is a Windows system file, installed and updated by Windows itself. Its official description: “Authorization Framework”, by Microsoft Corporation.

If it is missing or damaged, Windows displays for example: “The program can't start because authz.dll is missing from your computer.” Two methods can fix the error, below.

Method 1 · quick · about 1 minute

Download only authz.dll

Ideal if only this file is reported missing: you replace a single file, without reinstalling anything.

⇓ Download authz.dll .zip file: the DLL + its instructions · downloaded 1,921 times

Version: 6.1.7600.16385
Size: 56.83 KB
Publisher: Microsoft Corporation

Then:

Extract authz.dll from the zip file and copy it to the folder of the program showing the error (where its .exe file is).

System file: copy it only to the folder of the program that shows the error. Never replace the version in C:\Windows; if the error persists, use method 2.

SHA-256: 630c9533aaf7e0e8e70e9b6377edd3f9ded550cbee6ba1071c9ee2c3802c4399 · Check on VirusTotal · Product: Microsoft® Windows® Operating System

Other versions of this file: AUTHZ.dll (5.1.2600.2622, 32-bit)

Method 2 ·complete · official method · 15 to 30 minutes

Repair Windows files (SFC and DISM)

Windows can check and replace its own missing or damaged system files with the official DISM and SFC tools.

Microsoft: System File Checker tool

Open a Command Prompt as administrator: Start menu, type cmd, right-click › Run as administrator.
Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter, wait until it finishes, then type sfc /scannow and press Enter.
Restart your computer, then install the updates offered by Windows Update.

Complete guide: Missing Windows system DLL

Error messages related to authz.dll

The program can't start because AUTHZ.dll is missing.
The program can't start because authz.dll is missing.
Error loading AUTHZ.dll. The specified module could not be found.
Error loading authz.dll. The specified module could not be found.
Failed to load AUTHZ.dll
Failed to load authz.dll

Why does this error occur?

The program expects another version of the file (old program, or designed for another version of Windows).
Damaged system file: crash, power cut, failing disk.
Malware or antivirus that modified or deleted the file.

Other Windows system files

KERNEL32.dll User32.dll XInput1_4.dll comctl32.dll d3d11.dll d3d9.dll dxgi.dll msvcrt.dll shell32.dll winmm.dll

Frequently asked questions

Should I copy authz.dll to C:\Windows\System32?

No: replacing a system file with another version can prevent Windows from starting. Only copy it to the program’s folder, or repair Windows with SFC and DISM.