- System Restore.
- Restart your system.
- Run System File Check.
Critical Process Died Blue Screen Error in Windows 10 Unable to Boot Fix 
When starting up Windows 10, you would feel fairly bothered if a blue screen with the stop code “Critical Process Died” keeps appearing. Here in this article, you’ll find a brief introduction of the BSOD stop code, as well as solutions to the issue Critical Process Died Windows 10 wont boot.
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Critical_Process_Died refers to when a critical system process dies while showing its bug check error code 0x000000EF or a blue screen error. If a critical system cant run properly, the operating system will run into some troubles.
Consequently, it will crash and show you errors on your computer in Windows 10 like “Your PC ran into a problem and needs to restart. We’re just collecting some error info, and then we’ll restart for you. (n% complete)”, just like the following screenshot.
Some computers ever enter the loop of continuous rebooting due to “Critical Process Died” every time. The related topic – Critical Process Died keeps restarting is also can be found online.
This Windows 10 stop code occurs when the process required to boot the operating system ended accidentally for some unknown reasons. This error typically occurs after a Windows 10 system upgrade or the installation of a new Windows in PCs.
Due to Windows 10 advantages, most people choose to upgrade to the new system. However, this upgrade may cause some issues, for example, partition disappearance, slow startup speed, etc. Even during the process of Windows upgrade or after a successful upgrade, the 0x000000ef error or BSOD stop code could appear due to the compatibility issue, RAM issue, corrupted or modified system files, bad sectors, etc.
Well then, what should you do to fix Windows 10 when its critical process died after update? Get the solutions in the following sections now.
In fact, Windows 10 Critical Process Died on boot is a common issue talked about in many forums and articles, and we have found some useful solutions to fix it as follows.
Quick Video Guide:
Solution 1: Restart Computer in Safe Mode
In general, this error can make your desktop or laptop unable unusable and you have to restart your computer. You always get this issue every time you restart the computer. In this case, you can restart the computer in safe mode.
This is quite a quick way for turning on the computer Windows system, which may prevent you from getting this error in the process of computer startup.
You can also enter into Safe Mode through another way. Please use an installation disc or restart your PC several times to boot to WinRE. Then click Troubleshoot → Advanced options → Startup Settings → Restart. You will get the following screenshot; press the corresponding key so as to enable Safe Mode.