Hello,
Thank you for posting in Microsoft Q&A.
Based on the description, I understand your question is related to Stop Code: Critical Process Died.
The CRITICAL_PROCESS_DIED bug check has a value of 0x000000EF. This check indicates that a critical system process terminated. A critical process forces the system to bug check if the system terminates. This check happens when the state of the process is corrupted or damaged. When the corruption or damage happens, as these processes are critical to the operation of Windows, a system bug check occurs as the operating system integrity is in question.
If you recently added hardware to the system, try removing or replacing that hardware. You can also check with the manufacturer to see if any patches are available.
If new device drivers or system services have been added recently, try removing or updating them. Try to determine what changed in the system that caused the new bug check code to appear.
Check the System Log in Event Viewer for other error messages that might help pinpoint the device or driver that's causing the error. Look for critical errors in the system log that occurred in the same time window as the blue screen.
Check with the manufacturer to see if an updated system BIOS or firmware is available.
Try running the hardware diagnostics supplied by the system manufacturer.
Confirm that any new hardware that's installed is compatible with the installed version of Windows.
Run a virus detection program. Viruses can infect all types of hard disks formatted for Windows. Resulting disk corruption can generate system bug check codes. Make sure the virus detection program checks the Master Boot Record for infections.
Look in Device Manager to see if any devices are marked with the exclamation point (!). Review the events log displayed in driver properties for any faulting driver. Try updating the related driver.
Have a nice day.
Best Regards,
Molly
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