Windows 7 crashes with STOP: c000021a {Fatal System Error} The verification of a KnownDLL failed. system process terminated unexpectedly with a status of 0xc000012f (0x009e1da0 0x00000000). The system has been shut down.

[wza...@gmail.com]

Hi,

My son's computer started to reboot cyclically during start.
When I switched off automatic reboot after failure, I could see the following BSOD message:

STOP: c000021a {Fatal System Error} The verification of a KnownDLL failed. system process terminated unexpectedly with a status of 0xc000012f (0x009e1da0 0x00000000). The system has been shut down.

The problem appeared after yesterday's update of Windows 7.
The platform is Windows 7 home edition.
The hardware is HP Pavilion g6-1350sw (B2Z12EA)

Does anybody know how to cure it without reinstallation of windows?
The system repair procedure from installation DVD failed to solve the problem.
Booting in emergency mode also leads to the same BSOD.
Linux boots and works normally.

--
TIA & Regards,
Wojtek

[wza...@gmail.com]

I have found the website:
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/c000021a-fatal-system-error-the-verification-of-a/0194d296-e588-4433-91ed-ce1a5e630d6f

but it assumes, that the system may be started, which is not the case
(the system reboots even in emergency mode).

Is there any way to fix the problem e.g. by booting Linux and correcting some files or system setting on the Windows disk?

[bza...@gmail.com]

The ntblog.txt contains at the end:

Did not load driver @oem34.inf,%isnbgm2p%;Intel(R) HD Graphics 3000
Service Pack 112 14 2013 12:41:39.109
Loaded driver \SystemRoot\system32\ntoskrnl.exe
Loaded driver \SystemRoot\system32\hal.dll
Loaded driver \SystemRoot\system32\kdcom.dll
Loaded driver \SystemRoot\system32\mcupdate_GenuineIntel.dll
Loaded driver \SystemRoot\system32\PSHED.dll
Loaded driver \SystemRoot\system32\CLFS.SYS
Loaded driver \SystemRoot\system32\CI.dll
Loaded driver \SystemRoot\system32\drivers\Wdf01000.sys
Loaded driver \SystemRoot\system32\drivers\WDFLDR.SYS
Loaded driver \SystemRoot\system32\drivers\ACPI.sys
Loaded driver \SystemRoot\system32\drivers\WMILIB.SYS
Loaded driver \SystemRoot\system32\drivers\msisadrv.sys
Loaded driver \SystemRoot\system32\drivers\pci.sys
Loaded driver \SystemRoot\system32\drivers\vdrvroot.sys
Loaded driver \SystemRoot\System32\drivers\partmgr.sys
Loaded driver \SystemRoot\system32\drivers\compbatt.sys
Loaded driver \SystemRoot\system32\drivers\BATTC.SYS
Loaded driver \SystemRoot\system32\drivers\volmgr.sys
Loaded driver \SystemRoot\System32\drivers\volmgrx.sys
Loaded driver \SystemRoot\System32\drivers\mountmgr.sys
Loaded driver \SystemRoot\system32\DRIVERS\iaStor.sys
Loaded driver \SystemRoot\system32\drivers\atapi.sys
Loaded driver \SystemRoot\system32\drivers\ataport.SYS
Loaded driver \SystemRoot\system32\drivers\msahci.sys
Loaded driver \SystemRoot\system32\drivers\PCIIDEX.SYS
Loaded driver \SystemRoot\system32\drivers\amdxata.sys
Loaded driver \SystemRoot\system32\drivers\fltmgr.sys
Loaded driver \SystemRoot\system32\drivers\fileinfo.sys
Loaded driver \SystemRoot\System32\Drivers\Ntfs.sys
Loaded driver \SystemRoot\System32\Drivers\msrpc.sys
Loaded driver \SystemRoot\System32\Drivers\ksecdd.sys
Loaded driver \SystemRoot\System32\Drivers\cng.sys
Loaded driver \SystemRoot\System32\drivers\pcw.sys
Loaded driver \SystemRoot\System32\Drivers\Fs_Rec.sys
Loaded driver \SystemRoot\system32\drivers\ndis.sys
Loaded driver \SystemRoot\system32\drivers\NETIO.SYS
Loaded driver \SystemRoot\System32\Drivers\ksecpkg.sys
Loaded driver \SystemRoot\System32\drivers\tcpip.sys
Loaded driver \SystemRoot\System32\drivers\fwpkclnt.sys
Loaded driver \SystemRoot\system32\drivers\volsnap.sys
Loaded driver \SystemRoot\System32\Drivers\spldr.sys
Loaded driver \SystemRoot\System32\drivers\rdyboost.sys
Loaded driver \SystemRoot\System32\Drivers\mup.sys
Loaded driver \SystemRoot\System32\drivers\hwpolicy.sys
Loaded driver \SystemRoot\System32\DRIVERS\fvevol.sys
Loaded driver \SystemRoot\system32\drivers\disk.sys
Loaded driver \SystemRoot\system32\drivers\CLASSPNP.SYS
Loaded driver \SystemRoot\system32\DRIVERS\cdrom.sys
Loaded driver \SystemRoot\System32\Drivers\Null.SYS
Loaded driver \SystemRoot\System32\Drivers\Beep.SYS
Loaded driver \SystemRoot\System32\drivers\vga.sys
Loaded driver \SystemRoot\System32\DRIVERS\RDPCDD.sys
Loaded driver \SystemRoot\system32\drivers\rdpencdd.sys
Loaded driver \SystemRoot\system32\drivers\rdprefmp.sys
Loaded driver \SystemRoot\System32\Drivers\Msfs.SYS
Loaded driver \SystemRoot\System32\Drivers\Npfs.SYS
Loaded driver \SystemRoot\system32\DRIVERS\tdx.sys
Loaded driver \SystemRoot\system32\drivers\afd.sys
Loaded driver \SystemRoot\System32\DRIVERS\netbt.sys
Loaded driver \SystemRoot\system32\DRIVERS\wfplwf.sys
Loaded driver \SystemRoot\system32\DRIVERS\pacer.sys
Loaded driver \SystemRoot\system32\DRIVERS\vwififlt.sys
Loaded driver \SystemRoot\system32\DRIVERS\netbios.sys
Loaded driver \SystemRoot\system32\DRIVERS\wanarp.sys
Loaded driver \SystemRoot\system32\drivers\termdd.sys
Loaded driver \SystemRoot\system32\DRIVERS\rdbss.sys
Loaded driver \SystemRoot\system32\drivers\nsiproxy.sys
Loaded driver \SystemRoot\system32\drivers\mssmbios.sys
Loaded driver \SystemRoot\System32\drivers\discache.sys
Loaded driver \SystemRoot\System32\Drivers\dfsc.sys
Loaded driver \SystemRoot\system32\drivers\blbdrive.sys
Loaded driver \SystemRoot\system32\DRIVERS\tunnel.sys
Loaded driver \SystemRoot\system32\drivers\CmBatt.sys
Loaded driver \SystemRoot\System32\Drivers\fastfat.SYS
Loaded driver \SystemRoot\System32\drivers\dxgkrnl.sys
Loaded driver \SystemRoot\system32\DRIVERS\igdkmd64.sys
Loaded driver \SystemRoot\system32\DRIVERS\HECIx64.sys
Loaded driver \SystemRoot\system32\drivers\usbehci.sys
Loaded driver \SystemRoot\system32\DRIVERS\HDAudBus.sys
Loaded driver \SystemRoot\system32\DRIVERS\netr28x.sys
Loaded driver \SystemRoot\system32\DRIVERS\vwifibus.sys
Loaded driver \SystemRoot\system32\DRIVERS\Rt64win7.sys
Loaded driver \SystemRoot\system32\DRIVERS\RtsPStor.sys
Loaded driver \SystemRoot\system32\DRIVERS\i8042prt.sys
Loaded driver \SystemRoot\system32\DRIVERS\kbdclass.sys
Loaded driver \SystemRoot\system32\DRIVERS\SynTP.sys
Loaded driver \SystemRoot\system32\DRIVERS\mouclass.sys
Loaded driver \SystemRoot\system32\drivers\wmiacpi.sys
Loaded driver \SystemRoot\system32\DRIVERS\intelppm.sys
Loaded driver \SystemRoot\system32\drivers\CompositeBus.sys
Loaded driver \SystemRoot\system32\DRIVERS\clwvd.sys
Loaded driver \SystemRoot\system32\drivers\ksthunk.sys
Loaded driver \SystemRoot\system32\DRIVERS\AgileVpn.sys
Loaded driver \SystemRoot\system32\DRIVERS\rasl2tp.sys
Loaded driver \SystemRoot\system32\DRIVERS\ndistapi.sys
Loaded driver \SystemRoot\system32\DRIVERS\ndiswan.sys
Loaded driver \SystemRoot\system32\DRIVERS\raspppoe.sys
Loaded driver \SystemRoot\system32\DRIVERS\raspptp.sys
Loaded driver \SystemRoot\system32\DRIVERS\rassstp.sys
Loaded driver \SystemRoot\system32\DRIVERS\hamachi.sys
Loaded driver \SystemRoot\system32\drivers\swenum.sys
Loaded driver \SystemRoot\system32\DRIVERS\umbus.sys
Loaded driver \SystemRoot\system32\DRIVERS\ew_jubusenum.sys
Did not load driver \SystemRoot\System32\drivers\vga.sys
Loaded driver \SystemRoot\system32\DRIVERS\usbhub.sys
Loaded driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Loaded driver \SystemRoot\system32\DRIVERS\stwrt64.sys
Loaded driver \SystemRoot\system32\DRIVERS\IntcDAud.sys

[wza...@gmail.com]

We have given up :-(.
We've booted Linux and backed up user files on Linux partition
Afterwards we reinstalled Windows, backed up when the computer was fresh with "partimage".
Of course all updates and software had to be reinstalled after that...