Spawn

Administrator
Verified
Staff member
List of current issues
Windows 10 Laptop shows a BlueScreen (c000021a) and turns off.
On 27th; I tried Steps 1 to 4 before turning on and logging into Windows
On 28th; BSOD on first boot, then turned off. Turned on correctly on second attempt.
On 29th; BSOD on first boot, then turned off. Turned on correctly on second attempt.

Event Viewer:
- Windows stopped working
- Windows failed to start because of missing system files
- Shut down unexpectedly
Steps taken, but have been unsuccessful?
1. Windows Automatic Repair - No fix
2. Troubleshoot CMD > CHKDSK /F /R - No fix
3. Troubleshoot CMD > SFC /SCANNOW - No fix
4. Troubleshoot > Uninstall latest quality update - Temp fix?
5. Updated Windows Defender Antivirus
First noticed this issue on the 27th April 2019.
Windows 10 BSOD Error c000021a - Windows Stopped Working / Unexpected Shut down
Problem Event Name: BlueScreen​
Code: c000021a​
OS Version: 10.0.17763.2.0.0.256.48​

Power Options > Fast start-up is turned off.
Windows Updates > Update History > Last quality update installed (KB4493509) on 23rd April 2019

  • 27th April 2019 - View tech. details does not state the missing system files.
212959


  • 28th April 2019
212960


  • 29th April 2019 (Today)
212961





Status: Not yet solved
 

LASER_oneXM

Level 36
Verified
the sysnative board is providing BSOD analysis (guided by moderators only) using several tools that are providing (much more)
detailed informatons about the crash/system. They also are prividing customized scrips to resolve the problem.
The guys has already helped me out several times (had several problems with BSOD, windows-update and driver problems)

 

Spawn

Administrator
Verified
Staff member
Edit: Laptop booted up fine, no BSOD today.
Which one?
SanDisk SD6SF1M128G
If you use Marcrium Reflect, it has an option to fix startup. Have had to use it a few times. Have you started up your computer three times in a row to trigger advanced boot options?
I no longer use Macrium Reflect, only Windows Backup.
@Spawn Have you tried using BlueScreenView or WhoCrashed to try and find the cause of the BSOD?
I'll take a look at them, thank you.
 

ticklemefeet

Level 23
The movie I posted above helped a bunch with your same problem. That error is caused one of two system files or third party software.
 

Vasudev

Level 30
Verified
Edit: Laptop booted up fine, no BSOD today.

SanDisk SD6SF1M128G

I no longer use Macrium Reflect, only Windows Backup.

I'll take a look at them, thank you.
I remember seeing some BSODs on some Intel Rapid storage driver changelogs. You can upgrade to latest 17.2.x and older ones are deprecated now.
 

Spawn

Administrator
Verified
Staff member
Last edited:

Vasudev

Level 30
Verified
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