blue screen and error 0xc000021a and the continuous repair loop

RayB63 · 24 Nov 2015

blue screen and error 0xc000021a and the continuous repair loop
please help
Attachment 50235

Attachment 50236

axe0 · 25 Nov 2015

Hi RayB63,

I have a few questions for you thanks to my own experience with this crash.

When started the crash to occur?
In my experience, people weren't able to boot into the system to run the tool with this crash.
Are you running in safe mode to run the dm log collector?

RayB63 · 25 Nov 2015

Crash started a few days after I changed from 32 to 63 bit. It is running " OK" after 2 Re-sets. (Not in safe mode, regular way)
I do have problems with Mouse & keyboard not working at start up, after 2 or 3 re-starts they work,
Also after the resets,
Snipping tool doesn't work. Up to now these are some problems i have seen.
Hey thanks for your fast response.
Ray

axe0 · 26 Nov 2015

This 'OK' is good enough for no bluescreens?
What was the reason to change from 32 to 64 bit?

RayB63 · 26 Nov 2015

axe0 said:

This 'OK' is good enough for no bluescreens?
What was the reason to change from 32 to 64 bit?

I changed because I had problems with memories, it was crashing when I had tabs opened and moved from top to bottom, for example in Google images.
But let me tell you now that last night I found there was some updates Windows had available, so I thought this might help. I downloaded them, restarted the PC. Bluescreen is back! This is getting to be a pain in the neck. Right now I'm resetting it. Hopefully you can tell me what can I do. Thanks.

axe0 · 26 Nov 2015

I would start with verifying the system files before updating and after updating.
I know this might be difficult with the update system of Windows 10, but you only need to regularly check if updates have been installed.
To verify the system files:

Diagnostics Test

System File Check

Please try following:

Open an admin command prompt
Copy/paste "sfc/scannow" (without quotes) and press enter
When it finished reboot your system
Open again an admin command prompt
Enter sfc/scannow again

If sfc/scannow does NOT say "Windows Resource Protection did not find any integrity violation" after the second SFC, please upload the cbs.log file located at {windows partition}\Windows\Logs\CBS\, if the file is too large try a 3rd party uploader like dropbox, onedrive, google drive, mediafire etc.
System File Check(SFC a.k.a. Windows Resource Protection) needs to have your system rebooted in order for sfc to try to fix the problems that it finds.

RayB63 · 26 Nov 2015

OK, right now it is installing Windows again. So, I should do next is to install all my programs (apps) again, and do the scan you tell me, but what do I do with the updates, should I not install.

axe0 · 26 Nov 2015

Do you know what update is installing when the crash occurs?

RayB63 · 26 Nov 2015

Sorry don't remember.

axe0 · 26 Nov 2015

Too bad

Just install the updates, when you get this loop try to get into safe mode.
I don't know if you have recovery media? If not, create one.
Recovery Drive - Create in Windows 10 - Windows 10 Forums

Recovery media is what you need to boot from.
Thus, connect/insert the recovery media, boot to the boot options and choose to boot from the recovery media.
Once booted, search the option to boot in safe mode.
If this option is not available, go to the advanced options and choose command prompt.
In command prompt enter the command

Code:

start msconfig

and press enter, this should bring up msconfig.
In msconfig, go to the boot tab and enable safe mode.
Click apply>ok and reboot if asked.