Windows Memory Diagnostic (mdsched.exe) May 2026

The screen went black. A few seconds of terror—did she just kill it for good?—then the familiar Windows boot logo, but underneath, white text on a blue field: .

Login screen. Her fingers trembled as she typed her PIN. Desktop loads. And then, rising from the system tray like a ghost from a grave, a notification from the Action Center: windows memory diagnostic (mdsched.exe)

The system rebooted without warning.