Record the stop code and the name shown after “What failed.” Protect important data before repeated disk or repair operations.
This stop code means a Windows process essential to system operation ended unexpectedly, often because of corrupted system files, storage trouble, drivers, or unstable hardware.
This stop code usually appears when a driver does not complete a required power-state change during sleep, wake, shutdown, or device power management.
Windows lost access to the system drive during startup, which can follow storage-controller changes, failed updates, disk trouble, cloning, or firmware configuration changes.