application exception

0xC000041D FATAL_USER_CALLBACK_EXCEPTION

A callback into user code threw an exception Windows would not let continue — often UI frameworks or plugins during a window message. Treat it like an application bug with a strong hint that a third-party hook is involved.

What to do about it

Update the program and any shell extensions / overlays.
Disable recently added Explorer or Office add-ins.
Check Event Viewer → Application for a richer .NET or application error at the same timestamp.

Where you will see this

Windows Error Reporting writes this code into Report.wer files and app-crash minidumps when a program dies but Windows itself stays up. It is not a blue-screen stop code — for those see the stop-code library.

See which module threw this exception

Drop the program's .wer report or crash dump into the app-crash reader — the faulting module is usually the real story. Parsed locally.

Open the app-crash reader →