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Appcrash taskeng.exe

I'm getting this a LOT on my SBS2008 server. Can anyone help me track down the culprit?

Problem signature:
  Problem Event Name:	APPCRASH
  Application Name:	taskeng.exe
  Application Version:	6.0.6002.18342
  Application Timestamp:	4cd34898
  Fault Module Name:	ntdll.dll
  Fault Module Version:	6.0.6002.18881
  Fault Module Timestamp:	51da3d16
  Exception Code:	c000071b
  Exception Offset:	0000000000082445
  OS Version:	6.0.6002.
  Locale ID:	1033
  Additional Information 1:	8975
  Additional Information 2:	803d51a048d13ed597ff94fe6ba3464e
  Additional Information 3:	8975
  Additional Information 4:	803d51a048d13ed597ff94fe6ba3464e

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Qlemo"Batchelor", Developer and EE Topic Advisor
Top Expert 2015

taskeng.exe is part of Task Scheduler, but that is almost all we get as a hint. Causes are that many that all I can suggest is to perform a search for "appcrash taskeng c000071b" to get troubleshooting hints.
One frequent tip is to check AntiVirus etc. software for known issues.


Seems to only happen under the administrator login. Not sure where to look. Google's got nothing, really.
Top Expert 2013
Elixir2 --
Run SFC /SCANNOW from an administrative command prompt.

If no help, it may be fastest and simplest to run a Repair Install
This should not affect personal data or installed programs, but a backup first is always a good idea.
Top Expert 2015
Any log messages before that crash or after? Like same in all cases?
Most of the hits I got point to malware; specifically redirect Trojans.
Run Roguekiller and see what it finds: http://www.bleepingcomputer.com/download/roguekiller/


Good suggestions -
SFC came back clean. I am NOT doing a repair install on a Small Business 2008 server. LOL just sayin.
I will follow up with log messages, if any. Working Roguekiller now.


Roguekiller is also clean.

Windows Error log first shows "Error 1000 Application Error" which contains the same information in the OP above.

But at the same time - exactly coinciding times on the error log - we see "Error 1004 CertificateServicesClient - Certificate Services Client Provider pautoenr.dll raised an exception. Exception code 3221225477." No further details.

This is new to me and looks promising. What next?


Working this link. Due to multiple reboots and possible need to be on-site, resolution might not happen today.
Qlemo"Batchelor", Developer and EE Topic Advisor
Top Expert 2015

Looks promising, but "This is an involved process with several reboots".