ERROR_BOOT_ALREADY_ACCEPTED 0x80070434

Error code 1076 · HRESULT 0x80070434

WINDOWS

The current boot has already been accepted for use as the last-known-good control set.

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_BOOT_ALREADY_ACCEPTED is a Windows error code (system error 1076, returned as HRESULT 0x80070434) reported by Windows. Its official message is: “The current boot has already been accepted for use as the last-known-good control set.”

How to fix ERROR_BOOT_ALREADY_ACCEPTED

  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_SERVICE_DEPENDENCY_DELETEDERROR_SERVICE_NEVER_STARTEDERROR_ALREADY_RUNNING_LKGERROR_LOGON_FAILUREERROR_FILE_CORRUPTERROR_DISK_CORRUPTERROR_TIMEOUTERROR_INSTALL_FAILURE

Source: Microsoft WinError.h

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