How to Fix Bug Check 0xEF: CRITICAL_PROCESS_DIED

How to Fix Bug Check 0xEF: CRITICAL_PROCESS_DIED YvsdwCa

The CRITICAL_PROCESS_DIED bug check has a value of 0x000000EF. This indicates that a critical system process died.

This error occurs on Windows startup when a key Windows system process fails to run properly. This can be caused by system file corruption, incorrect device drivers, or damaged file system.

The most common cause of this error is a Windows service that encounters a serious error on startup, or a misconfigured or buggy device driver that crashes on startup.

On Windows Vista and later versions of Windows OS, it is possible to use the built-in SFC (system file checker) tool to automatically scan a computer’s system files and repair them if necessary.




Repair Corrupted Windows System Files With the SFC Utility

Boot your computer with Windows Installation DVD and from Windows Recovery Environment (WinRE) start the Command Prompt.

Type below command at the Command Prompt and press Enter key.

The following command scans integrity of all protected Windows system files and repairs files with problems when possible.

Code:

Sfc  /Scannow   /OFFBOOTDIR=C:\   /OFFWINDIR=C:\Windows


How to Fix Bug Check 0xEF: CRITICAL_PROCESS_DIED ClpuQHK

Replace partition drive letter C: with Windows installed partition drive letter.  When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.





Check The Hard Disk With CHKDSK Utility

Boot your computer with Windows Installation DVD and from Windows Recovery Environment (WinRE) start the Command Prompt.

Type below command at the Command Prompt and press Enter key.

Following command will  fixes errors on the disk and locates bad sectors and recovers readable information.

Code:

Chkdsk C: /r


Replace the partition drive letter C: with Windows installed partition drive letter.


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