STOP: c000021a {Fatal System Error}

Asus / Asus rog
November 19, 2018 at 15:17:02
Specs: Windows 10 Professional, AMD Ryzen 3
(Please ignore the specs at top. This is my Laptop ProBook 6560b with Windows 7)

I upgraded my Laptop to Windows 10 Pro (1803) from Windows 7 Pro. Model Number ProBook 6560b.
It installed fine no problems until I found out there was no sound. Everything looked good in device manager no errors and it showed the correct driver but there just was not any sound at all. I uninstalled the driver and reinstalled it from device manager. Still no sound so I decided to use the go back to Windows 7 feature. After is restored Windows 7 I get the following error.

STOP: c000021a {Fatal System Error}
The verification of a knownDLL failed. System process terminated
unexpectedly with a status of 0xc0000428 (0x002f2780 0x00000000)
The system has been shut down.

I have done some research and it seems STOP: c000021a is related to winlogin.exe or csrss.exe. I am not sure how to fix this I hope there is a way without reinstalling. I have tried startup repair and Last Known Good Configuration.

message edited by ChristopherTGarrett


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#1
November 19, 2018 at 18:12:48
There are no HP drivers for this (business) notebook available:
https://support.hp.com/ph-en/driver...

The Win 8.1 drivers could be used but no guarantee it will work.

Can you start windows in safe mode?


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#2
November 19, 2018 at 18:34:20
They are selling this same model with Windows 10 as they are several HP Business Machines So there are drivers somewhere I just did not have the time to search so that is why I reversed back to Windows 7. Your reply has nothing to do with the issue but thanks anyway.
HP ProBook 6560b with Windows 10

https://www.ebay.com/sch/i.html?_fr...

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#3
November 19, 2018 at 19:00:12

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#4
November 21, 2018 at 11:07:50
I restored a acronis true image backup image of Windows 7 I had before I did a clean install a few weeks ago. So the laptop is fine. This morning I did the upgrade to Windows 10 again and the only problem I am having now is Activation I get a message Activation severs cannot be reached.. This laptop was qualified back in 2015 for the free Windows 10 upgrade so there should be no problems with Activation. Everything else works Sound Video ETC. I am not sure what to do about the activation issue. I know a few weeks ago Microsoft had a problem with their Activation servers is that fixed by now?

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