If prompted for “Disk 2” or “Disk 3”, point to the same CD/ISO folder – AutoDATA 3.40 often bundles all data on one disc.

Final note: AutoDATA 3.40 is not officially compatible with Windows 10. This guide provides a functional workaround, but for professional garage use, consider upgrading to a modern cloud‑based solution like AutoDATA Online or a current aftermarket diagnostic system.

Installing Autodata 3.40 on a modern Windows 10 system is a multi-stage process that requires bypassing several security layers designed for newer software. Because this legacy application relies on specific drivers and environment settings no longer standard in Windows 10, you must manually configure "Test Mode" and administrative privileges to ensure successful execution. Preparation and System Configuration

The first critical phase involves preparing the Windows 10 environment. Modern security features like User Account Control (UAC) and real-time antivirus protection often block the installation of legacy drivers used by Autodata.

Disable Security Layers: You must disable UAC via the Control Panel and temporarily turn off any active antivirus or Windows Defender real-time protection.

Enable Test Mode: Autodata 3.40 uses an unsigned driver for its emulator. To allow this on Windows 10, you must enable "Test Mode" using a tool like the Driver Signature Enforcement Overrider (DSEO) or by running bcdedit /set testsigning on in an Administrator Command Prompt. A system restart is mandatory after this step to see the "Test Mode" watermark in the corner of your screen. Installation and Driver Signing

Once the system is in Test Mode, you can proceed with the core installation files.

Run the Installer: Locate the Install_x86 or Install_x64 file (depending on your system's architecture) and run it as an Administrator.

Sign System Files: Use the DSEO tool again to "Sign a System File." You will need to point it specifically to the emulator file, typically located at C:\Program Files (x86)\AuDaS0\AuDaS0.sys for 64-bit systems.

Final Restart: Reboot the computer once more to finalize the driver signature. Licensing and Registration

The final phase involves generating the unique license key required for the software to launch.

Obtain UID: Open the "Keygen" folder and run GetUid-x64 (or x86) as an Administrator to retrieve your computer’s unique ID.

Generate License: Run the keygen application and enter the UID (typically only the last 8 digits) to create a .reg registry file.

Registry Update: Double-click the newly created registry file to add the license information to the Windows Registry.

For a visual walkthrough of the software interface and detailed troubleshooting steps, refer to these guides:

Before attempting the installation, ensure you have:

Important: AutoData 340 relies on older database engines (often Microsoft Access or FoxPro). Windows 10 blocks some legacy components by default. You must re-enable them.

This is the most critical step.

  • Click Apply → OK.

    • Now, right-click the setup file again and select Run as administrator.

    To avoid repeating compatibility steps:

    Pin this shortcut to the taskbar for quick access.

    He clicked the Autodata 340 shortcut. The splash screen showed… then a black window. He pressed Alt+Enter — nothing. He changed the shortcut’s target to:
    C:\Autodata34\Autodata.exe /win
    Still black.

    Then he remembered: old Autodata needed Windows 10’s legacy DirectPlay.
    Control Panel → Programs → Turn Windows features on/off → Legacy Components → ✅ DirectPlay.
    Reboot.

    If you try to run the program now, it will likely open and then immediately crash, or say "Key not found."