ERROR_ALREADY_INITIALIZED 0x800704DF

Error code 1247 · HRESULT 0x800704DF

WINDOWS

An attempt was made to perform an initialization operation when initialization has already been completed.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_ALREADY_INITIALIZED is a Windows error code (system error 1247, returned as HRESULT 0x800704DF) reported by Windows. Its official message is: “An attempt was made to perform an initialization operation when initialization has already been completed.”

How to fix ERROR_ALREADY_INITIALIZED

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_ALREADY_REGISTEREDERROR_ALREADY_FIBERERROR_ALREADY_THREADERROR_ALREADY_RUNNING_LKGERROR_CONTINUEERROR_NO_MORE_DEVICESERROR_NOT_LOGGED_ON

Source: Microsoft WinError.h

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