aadjcsp.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: Discover details about aadjcsp.dll, its function, and how to troubleshoot related issues. Essential for system administrators and advanced users. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	32-bit (x86)	Compatible with 32 and 64-bit Windows
Creation date	08.11.2005 12:50:08
File version	10.0.19041.5794
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	✅ MD5: Verified	In file hash protection exist and it is verified.
File size	70.5 kb.	72192 bytes.

Hashes:

MD5: ccaf418fba7f79c0752ffc6d7d45a5de ✅
SHA-1: e96840dff11ed9d6f85832fce380642944a23d8d
SHA-256: d740e5227b95713aee1abf3693573e14f61cbe312403f0ea103b9718adbf4c1a
SHA-512: 445dee7dd6ba1903fe93d8460286eef3d1bb22cc1588dbefdfcdb36b7fad8da1d7c1c9e6f878905940370c5efd78b98cf2ad19a519193dcd34da791e1ce4e99d

✅ This file is compatible with 32-bit Windows and can run on ✅ 64-bit Windows (via the WOW64 subsystem).

The file aadjcsp.dll is the "AAD Join Crypto Service Provider" DLL, a legitimate Microsoft Windows system component responsible for Azure Active Directory (Azure AD) / Microsoft Entra ID join operations and related cryptographic authentication services.

Standard File Location

C:\Windows\System32\aadjcsp.dll
C:\Windows\SysWOW64\aadjcsp.dll (on 64-bit systems for 32-bit compatibility)

How to Fix aadjcsp.dll Errors Without Downloading

Method 1: Run System File Checker (SFC)

This built-in Windows tool scans for corrupted or missing system files and automatically replaces them using a local cached copy.

Press the Windows Key, type cmd, right-click Command Prompt, and select Run as administrator.
Type sfc /scannow and press Enter.
Wait for the scan to reach 100% completion and restart your computer.

Method 2: Run DISM (Deployment Image Servicing and Management)

If SFC fails to fix the file, DISM can repair the local Windows system image using Windows Update components.

Open Command Prompt as administrator.
Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
Once the process completes successfully, run the sfc /scannow command from Method 1 once more, then restart your PC.

Method 3: Re-register the DLL File

If the file is present but Windows cannot read it properly, re-registering it in the Windows Registry can resolve the conflict.

Open Command Prompt as administrator.
Type regsvr32 aadjcsp.dll and press Enter.
If an error occurs, navigate directly to the folder first by typing cd C:\Windows\System32 and pressing Enter, then run the regsvr32 aadjcsp.dll command again.

Method 4: Install Pending Windows Updates

Since this is a core operating system file, Microsoft frequently updates it through official security patches.

Open Settings (Windows Key + I).
Go to Update & Security (or Windows Update).
Click Check for updates and install all available system and optional updates.
Restart your computer.

📊 Diagnostics Tool: Verify Your `aadjcsp.dll` File

Worried that the file on your PC has been modified by malware? Drop it into the form below. Our script will verify its file size, cryptographic hash (MD5/SHA-1), and check for a valid Microsoft digital signature.