Hi All, really need to pick your brains on this one. Am a Network Manager at a school we keep getting this BSOD Problem on 1 PC, all pc’s are WDS built we have a around 30 of these Dell Optiplex but this is the only one having a problem.

This normally happens in the morning around 9-10am

lately happening less once a month or so.

we have created a helpdesk ticket on this problem:

Have seen the BSOD Message it reads the following:

Massage Begins…


STOP: c000021a {Fatal System Error}

The Windows Subsystem system process terminated unexpectedly with a status of 0xc0000005 (0x750ef33d 0x0082eflc).

The system has been shut down.


MESSAGE ENDS…

see photo attached of BLUE SCREEN OF DEATH

The following has been done:

- Tests to carry out - http://www.sevenforums.com/tutorials/715-memory-diagnostics-tool.html

  • Memory test (extended) was carried out. no problems found.

  • Disk check was also carried out. there was no problems found

  • Malwarebytes scan carried out 28 items found no major threats.

Any ideas?

@Dell_Technologies

2 Spice ups

You have a device driver or system file that is causing a user-mode subsystem failure. Have you recently installed any sound, video or NIC cards? Or a wafer of memory? Try booting up in safe mode or do a diagnostic startup and start isolating all the working services and devices. It’s usually a process of elimination. You can also run a system file check. Open up an admin console and type this - c:\sfc /SCANNOW

If it’s just the one PC… can you wipe and reinstall Windows? It may just be a corrupt system file.

My 2 cents -

I’ve had a lot of issues with memory testers claiming that RAM is good when in reality it isn’t. So I’d look into that. Also SFC can be an amazing tool in this regard. Do you you have any images of this particular model that you can put back on this machine? I’d recommend also a reimage to confirm it isn’t a software issue.

There are non Dell Freeware utilities that you can use to boot into ( Ultimate Boot CD immediately comes to mind ) to do some pretty extensive testing if you can confirm it is a hardware issue.

1 Spice up

I’m with MNOWAX, I would be sure you are using a quality memory testing program.

Grab a copy of the Dell 32 Bit diagnostics and burn to a CD/USB, at the prompt press 4, type mpmemory, custom, all tests, run.

The windows memory tests are trash. Would also be worth booting into the ddgui on the Dell Diag and running long tests on the HDD.

1 Spice up

Originally thought it was a NIC or Graphics Driver issue, but after installing the latest version that didn’t work.

We also installed re-installed the WDS image but that didn’t work either. reduced the amount of crashes to only once every 1 or 2 months but that was it.

The Image is used on 30+ machines 20 of them are the same Dell Optiplex 390 USFF (AIO) the same drivers and configuration and only this one has an issue.

Our last result is to do a fresh build but want to hold of that as i would really like to find the cause encase it happens to more machines.

will try a better RAM tool first and try the other options will let you know how i get on.

Thank guys

is Ultimate Boot CD Herins?

So have done a SFC no luck all clear, doing a Gold Memory test, waiting for results

No. Those are two different diagnostic disks.

http://www.hirensbootcd.org/

If this same image is used on multiple machines of the same model, it seems highly unlikely that the image is the problem. You already reinstalled the image on this machine, so… hardware or user error seem to be the two things for you to look at.

1 Spice up

so have done a memory test with Ultimate boot CD - No Faults found.

currently in process of doing a HDD test using UBC

Ok so last night A HDD check was also carried out it has passed on the Read test, however a bad sector has been found under a Verify test.

gonna but my hands up here HDD test is not my strong point, would this be the cause? 1 bad sector found.

Its a Seagate HDD (not a big fan of Seagate, find they are more likely to fail than a WD)

Took a photo of the report.

If it is the HDD i have a few spare 120gb SSDs could put one in there and see how it goes.

what do ya think?

That is a definitive answer to your issue. Swapping the HDD for a SSD should give you a nice performance boost as well.
Pending sectors don’t always mean a failed drive, it just means a failed sector. Often these can be cleared with something like MHDD(legacy). Considering you have the SSD’s, I would swap it anyway and put the HDD in the recycling bin.

1 Spice up

Thanks guys currently doing a SSD WDS Build now.

Awesome, Glad it helped you find the root cause.

Hardware issues are pretty hard to pinpoint with on board diagnostics ( unless it is really recent ) so I’ve leaned on UBCD a lot over the years.

1 Spice up

Hey Lewis-

Sorry to hear about the issues you were having… I’m glad you got the issue fixed, but were you able to get any support from Seagate? Let me know if you’d like me to put you in touch with anyone :slight_smile: