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Windows 10 Troubleshooting 0xc0000021A


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#1 Xaero91

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Posted 17 March 2017 - 08:16 PM

Hi all,

I've had quite a hard time trying to troubleshoot error code 0xc0000021A upon boot, resulting in a blue screen.
So far I've only managed to boot up the machine by disabling driver signature enforcement using the advanced startup recovery options, any others won't work (even safe mode).
This leaves my machine vulnerable and unusable for some applications, so I'm looking to fix this issue.

The issue popped up recently, after installing several programs associated to graphics and games.
I've tried uninstalling (and re-installing afterwards) all of those components trying to fix the issue, without any luck.

I've ran Malwarebytes scans, Windows Defender scans, Kaspersky's TDSSKiller and some other ones - all of them with 0 infections found.

Other options in the advanced startup recovery menu don't seem to help either:
- System Restore isn't available as there are no restore points to before the point when the problem occurred.
- Windows Startup Repair can't manage to fix the issue.
- System Image Recovery isn't available as there are no recent images.

chkdsk finds no errors or bad sectors.

sfc failed several times after i managed to boot up the machine. Until i ran it from CMD in advanced startup recovery options as described here, then it said it ran succesfully once - however when running it again there are remaining issues with C:\WINDOWS\System32\aepic.dll in the CSB log:
Hashes for file member \??\C:\WINDOWS\System32\aepic.dll do not match actual file [l:9]'aepic.dll'
I don't want to grab any dll i could use to replace it with from the net, since I don't know any reliable sources for these kind of DLLs.

Also, Windows 10 is up to date.


Is there anyone who can help me out troubleshooting this issue?
I don't know where to look anymore and re-installing the machine completely isn't an option at the moment.
Any hint or direction to look in would be appreciated, thanks in advance!

Kind regards,
Kevin



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#2 bwv848

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Posted 17 March 2017 - 08:55 PM

Greetings, Kevin and :welcome: to BleepingComputer.

Please follow these BSOD posting instructions and attach the requested files in your next reply.

Thanks.

Useful information!
Please only use the .ZIP compression format, do not use .7z, .rar, etc.!!!


If I do not reply in three days, please message me.
 
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#3 Xaero91

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Posted 18 March 2017 - 09:50 AM

Hi bwv848 :) 

Thanks for your reply and info/link.

Here's the information requested (everything is included in ZIP file):
https://mega.nz/#!lZ8W3IZD!YCmdeIzt6R7oirTyR3dXQdvXPhJBhyMlkiCIiLRT5vI
 

· OS - Windows 10 Pro 64-bit (Microsoft Free Upgrade, since 2016)
· Windows 7 Ultimate 64-bit (Full Retail, since 2015)
· Hardware Age - 2 Years
 
· CPU - Intel Core i7 4790K
· Video Card - NVIDIA GeForce GTX 970 (MSI)
· MotherBoard - MSI Z97S SLI Krait Edition
· Power Supply - EVGA Supernova 750W G2
 
· System Manufacturer - Self built desktop, mostly MSI components.

10iOH3e.png

 

I will execute all described in step 6 from the post you've linked right now.

 

I would like to thank you in advance for spending time on this, really appreciated.

Cheers,
Kevin


Edited by Xaero91, 19 March 2017 - 08:07 AM.


#4 bwv848

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Posted 18 March 2017 - 09:58 PM

Hi, Kevin,

 

Will you please stop using CCleaner for now as it automatically deletes memory dumps? After that, please reboot the computer and see whether if it creates any dump files (just run the Sysnative File Collection App again). BTW, I've found that 0xc021as are pretty much unsolvable, but I'll try my best to help you.

 

Regards,

bwv848


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#5 Xaero91

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Posted 19 March 2017 - 08:07 AM

Hi bwv848,

I see, good to know - i've made sure the BSOD happened meanwhile, did not use CCleaner and I've run the Sysnative FC App again.
Here are the results: https://mega.nz/#!Vd0mDQTC!gsZwp0_7dmSKQmKegXsXWpH-8RZlnKzNKrk6y9xAQ3A
I see there's a single dump file, but it's small so i hope this helps. If not, is there a way to verify the files i'm sending? So i don't waste your time.

Alright, appreciate the help man.

In case it doesn't work out, should a reinstall ('Refresh' or 'Reset' Windows) do the trick?
Or should we rule out any hardware related causes first? I doubt it will be a hardware issue, but i cannot know for sure atm.
Another party already advises me to do a reinstall, i rather wait on your results though.
Microsoft support advises me to run several bootrec commands to try and fix it - but i have no idea if this could be a solution (or make it even worse), i'll await your reply.

Cheers,
Kevin



#6 bwv848

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Posted 19 March 2017 - 04:22 PM

Thanks, Kevin. :) Looks like we have a complete memory dump — that will be helpful. Please upload it:


:step1: Upload MEMORY.DMP

• Press and hold the Windows Key + R on your keyboard at the same time.
• In the Run box, type in %WinDir% and hit Enter on your keyboard.
• Find the file MEMORY.DMP and copy/paste it on to your Desktop.
• Zip up MEMORY.DMP (use .ZIP please!!!) and upload it to a trustworthy file-sharing service.

 

Regards,

bwv848

 

P.S. Are you running Driver Verifier? Please disable it — it won't help in this case.


Edited by bwv848, 19 March 2017 - 04:23 PM.

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#7 Xaero91

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Posted 19 March 2017 - 04:31 PM

Hi bwv848,

​No problem, good to hear there's something you can work with.

Alright, here you go ​https://mega.nz/#!0MlgDYoR!bg-0s0xixOXmlZ6d8ihLgZeQ4W6QnhpVmyqeKMcJhWs

 

Yeah i was running Driver Verifier until several hours ago, i figured so meanwhile it was disabled.

PS - i also ran memory and hard drive tests like described but no hardware issues detected so far.

 

Thanks in advance! :)

Cheers,
Kevin


Edited by Xaero91, 19 March 2017 - 04:32 PM.


#8 bwv848

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Posted 19 March 2017 - 04:53 PM

Hi, Kevin,

fffff800`313796d8  fffff805`b049692c*** ERROR: Module load completed but symbols could not be loaded for iaStorA.sys
 iaStorA+0x692c
fffff800`31378a50  fffff805`b40f03c4*** ERROR: Module load completed but symbols could not be loaded for RDWM1110.SYS
 RDWM1110+0x3c4
fffff800`313784c8  fffff805`b3cea6a5*** ERROR: Module load completed but symbols could not be loaded for rt640x64.sys
 rt640x64+0x6a6a5
This is from my preliminary analysis of the dump. I don't know whether if the above drivers are culprits, but we should deal with them:

:step1: Update your Intel Rapid Storage Technology driver (iaStorA.sys) **DOWNLOAD LINK**
:step2: Remove your Roland OCTA-CAPTURE driver (RDWM1110), if necesssary physically remove the device from the system.
:step3: Update your Realtek Networking driver. **DOWNLOAD LINK**

Then try rebooting. If you get the BSOD again, send me MEMORY.DMP again please. :)

Thanks.

Regards,
bwv848

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#9 Xaero91

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Posted 20 March 2017 - 02:18 PM

Hi bwv848,

Thanks again. I've tried executing as instructed, please see details below.

1. Updated without any trouble.
2. Done, no trouble (disconnected at the moment).
3. The installer only offered to 'repair' or 'uninstall', i've repaired without any trouble.

I ran Intel Update Utility to make sure all drivers were up-to-date.
One of them wasn't, and couldn't be updated. Also the installer of the update was suggesting a 'downgrade' while it was clearly an update according to version numbers.

Please have a look:

Initial screen

WbaKhJg.png

When installing ('downgrade' seems illogical):
9VFOv3n.png

After updating, BSOD occurs (as well when disabling driver signature enforcement beforehand through CMD).
The update seems to fail (only 2 files in the Chipset folder - not sure if that is correct):

CGZg4CI.png

 

There doesn't seem to be a way to uninstall the current version either (to install new version afterwards):
5lSmxiU.png
Maybe because it's the chipset driver or the install is just broken i guess.

So the BSOD still occurs, i just wanted to share this info with you in case it could be related to the cause.
Here's a new memory dump:

https://mega.nz/#!UBUEDAYB!H02GF5IepdCN1s68CLJF2sS9rOFJORGWUWvbv0sEfdQ

I hope this helps :) thanks again for your time.

Cheers,
Kevin



#10 bwv848

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Posted 20 March 2017 - 02:56 PM

Hi, Kevin,

The latest dump file has the Intel Rapid Storage Technology driver referenced again. I highly suspect that it's the culprit, as it's one of the most problematic drivers ever (practically every version).

See whether if this guide helps.

Regards,
bwv848


Edited by bwv848, 20 March 2017 - 02:56 PM.

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#11 Xaero91

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Posted 20 March 2017 - 03:44 PM

Hi bwv848,

I've uninstalled it (had to try twice, last one with 'remove device software' worked) but ran into the bluescreen again after rebooting at least twice.
I think the uninstall was successful though:

C3KsXTn.png

Here's a new dump as well:
https://mega.nz/#!tUUgxC7J!5wLWW0yV7O9oggHNVB_zi1OsHz1HYG5UAO9yn73izx0

 

Hope this helps.

Also, if you think a Windows 10 'Refresh'/'Reset' with 'Keep my files & programs/settings' is a better option rather than troubleshooting at this point please say so.

Thanks in advance :) 

Cheers,
Kevin



#12 bwv848

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Posted 20 March 2017 - 03:51 PM

Hi, Kevin,

 

Please feel free to reset the computer, if you'd like to. But before you do that, can you try disabling Intel Rapid Storage Technology in the BIOS (if it's an option).

 

Regards,

bwv848

 

p.s. Is Intel Rapid Storage Technology still listed in the Control Panel?


Edited by bwv848, 20 March 2017 - 04:12 PM.

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#13 Xaero91

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Posted 20 March 2017 - 04:39 PM

Hi bwv84,

I've tried finding the RST option in the BIOS but did not find one (only Smart Connect, which was already disabled). Also uninstalled the driver just to see, but the BSOD still occurs.

Do you think a reset would do the trick though?

Here's another dump just in case:
https://mega.nz/#!1UlXGQIQ!pGUMC76z1nVf0_VLP04-cxaMUFIrpPWY7264cqYy6-4

Thanks again!

Cheers,
Kevin
 



#14 bwv848

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Posted 20 March 2017 - 04:46 PM

Hi, Kevin,

Theoretically, the reset should fix the problem, but be sure to backup all your data just in case something goes wrong. BTW, the MEMORY.DMP file is the same as the other ones. :)

Regards,
bwv848


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#15 Xaero91

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Posted 20 March 2017 - 04:49 PM

Hi bwv848,

Alright thanks for the info. I will try out the reset, wish me luck!

Haha god i didn't notice there wasn't a new dump generated ;)

Thanks for your help and time.

Cheers,
Kevin






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