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ERROR_FULLSCREEN_MODE
the requested operation cannot be performed in full-screen mode.
ERROR_FULLSCREEN_MODE means that a display or console operation is incompatible with the current full-screen presentation mode.
Where the result appears
- legacy console full-screen modes.
- display-mode transitions and older graphics compatibility paths.
- window-management operations that require a desktop windowed state.
- remote-session or virtualization environments emulating legacy full-screen behavior.
Typical causes
- the operation is defined only for windowed mode.
- the display/console subsystem is in the middle of a mode transition.
- the current session or graphics stack does not support the requested legacy feature.
- an application assumes historical full-screen behavior no longer provided.
What to collect
- session type, console host, display mode, and whether the app is local or remote.
- the exact UI/display API and requested operation.
- OS version, compatibility settings, graphics driver, and virtualization layer.
- events around switching into or out of full-screen mode.
Handling and recovery
Return to a supported windowed state before retrying, or replace the legacy operation with a modern window or presentation API. Applications should treat full-screen as presentation state, not as permission to use obsolete display mechanisms.
Common misinterpretation
This is not a generic “window is maximized” error. It normally concerns a subsystem-specific full-screen mode with restrictions beyond ordinary maximization.
References
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