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Windows Device Manager

Code 39: Windows cannot load the device driver; it may be corrupted or missing

The required driver is missing or corrupted.

First action

Reinstall the device driver using Device Manager.

Use the error code as a Windows device-state clue. It does not by itself identify the exact failed component inside the hardware.

Then verify

Do not stop at the code disappearing

  1. 1

    Use an official manufacturer driver if Windows cannot supply one.

  2. 2

    Retest after restart/driver installation.

After Windows reports the device normally, run the matching DeviceOK test when one exists—for example camera, microphone, keyboard, mouse, controller or audio—to confirm the user-facing function works.