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Windows 7: BSOD after Firefox update, Error c000021a

12 May 2017   #1
snsjets

Windows 7 Professional 64bit
 
 
BSOD after Firefox update, Error c000021a

c000021a
The verification of a knownDLL failed. system process terminated with a status of 0xc0000020 (0x0102c750 0x0000000).

Tried system repair with and without Windows 7 DVD and last known good configuration. All results in the same BSOD. Computer will not start in any Safe Mode. Startup Repair says it cannot repair automatically.
Unfortunately I cannot load(or don't know how to) the DM Log Collector because I cannot get access to the problematic computer. I used ESET SysRescue and ran several scans without success. I can, however, see the files on my C: drive using the ESET desktop utility.

History: Started having issues with computer freeze up after updating Firefox to 53.0. After the computer ran for half of the day, simply opening a new tab would completely freeze the computer. This happened on 3 computers - 1 desktop, 2 laptops. After the latest freeze up on the desktop, a press of the reset button on the tower lead to the BSOD.


My System SpecsSystem Spec
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12 May 2017   #2
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Please complete this needed tutorial by Brink.

Blue Screen of Death (BSOD) Posting Instructions - Windows 7 Help Forums

Jack
My System SpecsSystem Spec
12 May 2017   #3
axe0

Windows 10 Pro
 
 

Hi snsjets,

2 main causes in this kind of situations are the hard drive(s) and RAM.

For 1 of the tests below, HDTune, please use the bootable Win10PE from Windows 10 Recovery Tools - Bootable Rescue Disk - Windows 10 Forums to run them. This Win10PE has software preinstalled.
You could also try and use Macrium Reflect, also preinstalled, to fix boot issues if the hard drive and RAM appear fine.




BSOD after Firefox update, Error c000021a Diagnostics Test BSOD after Firefox update, Error c000021a
 HDD TEST

Note   Note
Please run HDTune first, in the order posted!

Run HDTune to
  • check the health,
  • scan for errors, no quick scan but full scan
  • run a benchmark.
It may take some time, but please take the time you need to perform it properly.
When above is done please make screenshots of the following
  • the health,
  • the error scan,
  • the benchmark incl. following
    • transfer rate,
    • access time,
    • burst rate,
    • cpu usage.

Run SeaTools DOS to check the integrity of your HDD. SeaTools for DOS and Windows - How to Use - Windows 7 Help Forums
Run the long test.
Note   Note
Do not run SeaTools on an SSD as the results will be invalid.

Make a photo of the result and post it.

Run chkdsk
Disk Check - Windows 7 Help Forums
Use option TWO with parameter /r
Upload the chkdsk log Check Disk (chkdsk) - Read Event Viewer Log - Windows 7 Help Forums



BSOD after Firefox update, Error c000021a Diagnostic Test BSOD after Firefox update, Error c000021a
 RAM TEST

Run MemTest86+ to analyse your RAM. MemTest86+ - Test RAM - Windows 7 Forums

Note   Note


MemTest86+ needs to be run for at least 8 complete passes for conclusive results. Set it running before you go to bed and leave it overnight. We're looking for zero errors here. Even a single error will indicate RAM failure.


Make a photo of the result and post it.

Addition:
If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.
If errors show up and you see them a lot later, no problem, the errors don't affect the test.
My System SpecsSystem Spec
.

16 May 2017   #4
snsjets

Windows 7 Professional 64bit
 
 

Hi Axe0,
Thank you for the reply.

I installed and ran Macrium's Fix Boot Problems utility - no change.
I did not run SeaTools since I boot from a SSD.
I also ran Malwarebytes that came with the Win10PE desktop - 0 threats.

I ran HD tune:
BSOD after Firefox update, Error c000021a-hdtune_benchmark_________m4-ct064m4ssd2.png

BSOD after Firefox update, Error c000021a-hdtune_error_scan_________m4-ct064m4ssd2.png

BSOD after Firefox update, Error c000021a-hdtune_health_________m4-ct064m4ssd2.png

HD Tune Health.txt

I ran chkdsk:
BSOD after Firefox update, Error c000021a-20170514_124317.jpg

I tried to install and run DM log collector from the Win10PE desktop but this is what happens:
BSOD after Firefox update, Error c000021a-dm1.png

BSOD after Firefox update, Error c000021a-dm2.png

Memtest86 is 14 hours in (still going) and no errors yet:
BSOD after Firefox update, Error c000021a-20170516_072047.jpg


My System SpecsSystem Spec
16 May 2017   #5
axe0

Windows 10 Pro
 
 

Those errors with the DM Log Collector are understandable.
Besides of the errors, does the DM Log Collector finish and leave some logs?

Please do note, it is recommended to run the hard drive tests on all partitions/drives. It occurs often that not the boot drive, but a different drive is causing issues.
My System SpecsSystem Spec
16 May 2017   #6
snsjets

Windows 7 Professional 64bit
 
 

I guess I didn't look for DM logs under the error windows. I will look for them next time I'm on the Win10PE desktop.

OK, I will run HD tests on the other partitions and the HDD.
My System SpecsSystem Spec
17 May 2017   #7
snsjets

Windows 7 Professional 64bit
 
 

Hi Axe0,

I ran 8 passes on Memtest86:
BSOD after Firefox update, Error c000021a-20170516_175835.jpg

I ran SeaTools on my HDD:
BSOD after Firefox update, Error c000021a-20170517_170045.jpg

I ran chkdsk on my HDD:
BSOD after Firefox update, Error c000021a-chkdsk1.png
BSOD after Firefox update, Error c000021a-chkdsk2.png

I ran HDTune on my HDD:
BSOD after Firefox update, Error c000021a-hdtune_benchmark_wdc_____wd1502faex-007ba.png
BSOD after Firefox update, Error c000021a-hdtune_error_scan_wdc_____wd1502faex-007ba.png
BSOD after Firefox update, Error c000021a-hdtune_health_wdc_____wd1502faex-007ba.png
HDTune.txt

I ran DM log collector on the Win10PE desktop (still with errors) and these are the files:
SFdebugFiles.rar


My System SpecsSystem Spec
18 May 2017   #8
axe0

Windows 10 Pro
 
 

Run the long test for Seatools.

The rest looks good, unfortunately the uploaded logs aren't of much use since most of it is corrupted (size is 0).

Could you provide your PSU and cooler.

Has SFC been performed on the system?
My System SpecsSystem Spec
18 May 2017   #9
snsjets

Windows 7 Professional 64bit
 
 

Ran SeaTools long test
BSOD after Firefox update, Error c000021a-20170518_132653.jpg

PSU is Antec BP550 Plus

Cooling is provided by 3 fans - front, back, and top of case

I attempted sfc (multiple times) after booting from the Windows 7 disk and this is what comes up: There is a system repair pending which requires reboot to complete. Restart Windows and run sfc again.

I attempted sfc from Win10PE desktop and this: Windows Resource Protection could not perform the requested operation.


My System SpecsSystem Spec
19 May 2017   #10
axe0

Windows 10 Pro
 
 

I presume stock cooling.

Do you have any peripheral attached?
My System SpecsSystem Spec
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 BSOD after Firefox update, Error c000021a




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