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Workstation Rebooting, BSOD, ntkrnlmp.exe

I have a workstation that is rebooting randomly and frequently.  I was able to pull the DMP file and run it through the Debug Diagnostic Tool.  The report is short, but does identify the process image as "ntkrnlmp.exe".

The tool also reports that "DebugDiag failed to locate the PEB (Process Environment Block) in MEMORY.DMP, and as a result, debug analysis for this dump may be incomplete or inaccurate."  The incomplete part certainly seems to be true.

Your expert advice as to further steps to troubleshoot this issue are greatly appreciated.
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Patt5735
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Patt5735
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2 Solutions
 
Warhound49Commented:
that sounds like a PSU problem to me. How long has it been working for? any recent changes to the hardware?
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Patt5735Author Commented:
It's been working for approximately three years.  No recent changes to hardware and/or software (other than Microsoft Updates, of course).

What about this points to the power supply?  Sudden reboots with an incomplete DMP file?
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Warhound49Commented:
lol, We have been studying PSU's at course and it just sounds like fits the bill. The only other thing I can think of is has gotten a virus. sry i couldn't help to much :)
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nobusCommented:
i would start by testing ram and disk, to knw if the basics are ok.
download ubcd, and run memtest86+ and the disk test   http://www.ultimatebootcd.com/
it can also be cause d by overheating :
open the desktop, and clean it from dust; verify that all fans are running normally
you can monitor your temps with speedfan : http://www.almico.com/speedfan.php      
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Warhound49Commented:
Got another idea, spyware. What is the anti-virus/spyware programs you use?
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Patt5735Author Commented:
It's running Norton Internet Security 2008, fully updated.  I will be trying Nobus' recommendations when I can get my hands on the machine again tomorrow.  Thus far I've been supporting it remotely, so it's been hard to troubleshoot any possible hardware issues.  Will report back with my findings . . . thanks everyone!
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nobusCommented:
well - NIS is known to cause many problems too -  so another option is to disable, or uninstall it for a test
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Patt5735Author Commented:
I ran memtest86+ for 22 hours.  I did find some errors.  Test # 6 returned 20 errors.  Test # 8 returned 7 hours.  Did this conclusively tell me that there is a memory hardware problem?

I was not able to get any of the HDD tools on the Ultimate Boot CD to run on this machine.  It is running SATA RAID, so I don't think any of those tools really apply to this hardware.  I don't suspect any hard drive problems, though.

Any further suggestions?
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Patt5735Author Commented:
Typo above . . . Test # 8 returned 7 errors.
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nobusCommented:
the ram test should have 0 = zero errors
test one stick at the time, and replace those with errrors - you can also test a stick in different ram slots (can be bad slots)
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Patt5735Author Commented:
I'm replacing both sticks of memory.  Will report back on the results.  Thanks!
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Patt5735Author Commented:
Replaced both sticks of memory.  Good as new.
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nobusCommented:
ok - tx for the feedback !
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