0xc000021a problem on windows 8.1 pro

[Murray123]

Hey everybody, I have been getting the BSOD code 0xc000021a for about two weeks now and haven't been able to fix it. I am running Windows 8.1 pro on a custom built pc with the error starting after a windows update. I have tried nearly everything, even by purchasing easy RE for £30 yet the problem still persists. Any help would be much appreciated. Thanks

 

[Colif]

Bug Check 0xC000021A: STATUS_SYSTEM_PROCESS_TERMINATED - The STATUS_SYSTEM_PROCESS_TERMINATED bug check has a value of 0xC000021A. This means that an error has occurred in a crucial user-mode subsystem.

Cause: This error occurs when a user-mode subsystem, such as WinLogon or the Client Server Run-Time Subsystem (CSRSS), has been fatally compromised and security can no longer be guaranteed. In response, the operating system switches to kernel mode. Microsoft Windows cannot run without WinLogon or CSRSS. Therefore, this is one of the few cases where the failure of a user-mode service can shut down the system.

Are you locked out of PC?
is there anything on C drive you want to rescue? try making this on another PC: http://www.howtogeek.com/howto/windows-vista/use-ubuntu-live-cd-to-backup-files-from-your-dead-windows-computer/

do you have a win 8 installer? https://www.microsoft.com/en-au/software-download/windows8 if you don't

I don't think there is an easy answer to this one, as error shows, if you missing or have corrupted versions of those 2 files, Win 8 won't work. I would be temped to run a reset,

change boot order so USB is first, hdd second
boot from installer
on screen after languages, choose repair this PC, not install.
choose troubleshoot
choose reset this PC
should be two choices, keep files/settings (only files kept are in library folders like documents, music, videos, pictures)(Settings = logins) or wipe it all (takes 8 back to how it was when you first got it)

 

[Murray123]

Thanks Colif for the quick response. I have copied the whole partition to a USB and do have important programs on my computer. Currently my pc is trying to boot up the windows and is currently is doing the spinning circle for about 2 hours now, should I have wait for it to finish?

 

[Colif]

i doubt its going to load after 2 hours. I would just stop it and try to boot off the installer instead,

 

[Murray123]

I'm on the troubleshoot screen with the 'refresh your pc' in front of me. If I select it will it delete all the appdata and the program 64 bit program's

 

[Colif]

yes. it takes you back to basic install, you have to get all the patches again. I think there is something like 200 but there is a short cut. Think you install this update (KB3138615) and it reduces the time it takes to get the rest

 

[Murray123]

If I refresh it, and install the program again and place the appdata into the directory that it creates, would It be in the same state as it was before this mess?

 

[Colif]

I am not sure, I have never tried it

 

[Murray123]

Yeah me too 😛 and as the latest back up for the program wasn't created due to the problem. I wouldn't want to backup to a later type.

 

[Colif]

what program is it?

 

[Murray123]

Minecraft-lmao jokes, problem fixed as I have reset the os. Thanks for the help