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:	6.0.6002.2.2.0.305.9
  Locale ID:	1033
  Additional Information 1:	8975
  Additional Information 2:	803d51a048d13ed597ff94fe6ba3464e
  Additional Information 3:	8975
  Additional Information 4:	803d51a048d13ed597ff94fe6ba3464e

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Elixir2Asked:
Who is Participating?
 
jcimarronCommented:
Elixir2 --
Run SFC /SCANNOW from an administrative command prompt.

If no help, it may be fastest and simplest to run a Repair Install
http://www.sevenforums.com/tutorials/3413-repair-install.html
This should not affect personal data or installed programs, but a backup first is always a good idea.
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
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.
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Elixir2Author Commented:
Seems to only happen under the administrator login. Not sure where to look. Google's got nothing, really.
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gheistCommented:
Any log messages before that crash or after? Like same in all cases?
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Davis McCarnOwnerCommented:
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/
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Elixir2Author Commented:
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.
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Elixir2Author Commented:
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?
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Elixir2Author Commented:
Working this link. Due to multiple reboots and possible need to be on-site, resolution might not happen today.
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Looks promising, but "This is an involved process with several reboots".
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