ERROR_CANNOT_FIND_WND_CLASS 0x8007057F

Error code 1407 · HRESULT 0x8007057F

WINDOWS

Cannot find window class.

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_CANNOT_FIND_WND_CLASS is a Windows error code (system error 1407, returned as HRESULT 0x8007057F) reported by Windows. Its official message is: “Cannot find window class.”

How to fix ERROR_CANNOT_FIND_WND_CLASS

  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_TLW_WITH_WSCHILDERROR_WINDOW_OF_OTHER_THREADERROR_INVALID_DWP_HANDLEERROR_INVALID_DATAERROR_WRITE_PROTECTERROR_NOT_READYERROR_CRCERROR_GEN_FAILURE

Source: Microsoft WinError.h

Last updated: