ERROR_FULLSCREEN_MODE 0x800703EF

Error code 1007 · HRESULT 0x800703EF

WINDOWS

The requested operation cannot be performed in full-screen mode.

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_FULLSCREEN_MODE is a Windows error code (system error 1007, returned as HRESULT 0x800703EF) reported by Windows. Its official message is: “The requested operation cannot be performed in full-screen mode.”

How to fix ERROR_FULLSCREEN_MODE

  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_UNRECOGNIZED_VOLUMEERROR_FILE_INVALIDERROR_NO_TOKENERROR_INVALID_FUNCTIONERROR_FILE_NOT_FOUNDERROR_PATH_NOT_FOUNDERROR_ACCESS_DENIEDERROR_NOT_ENOUGH_MEMORY

Source: Microsoft WinError.h

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