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Andre PFlag for Canada

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Help me solve the mystery of the random reboot and corrupted windows 7

A few weeks ago I had two users whose computers randomly rebooted with BSOD then recovered .. Then they gradually began running slower then began hanging on the please wait screen .. ran virus scans from safe mode but virus scans would not work .. installed virus scans but only found PUP threats ..
Ended up resetting computers to factory image and reinstalling apps . here it is two weeks later and the same thing is happening again .. Same two computers out of 30 machines .. I am at a loss as to what could be causing this to repeat .
They are getting messages saying something about windows being corrupt .
These machines are 2 years old and the symptoms just began a few weeks ago .
Please advise what you think could be causing this and steps to fix .
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efrimpol
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I am considering that but why just these two and how do I even go about pinpointing the update in question ?
After you re-imaged the computers, most likely updates were installed. I would look at the most recent updates (say in the previous week) and remove them and see if the bsod occurs.

Also, bear in mind that MS changed the way their updates work (I think either in Oct or Nov). Now they have a cum update. Maybe removing the last one may resolve the issue.
Typical symptoms of failing disks. Run the disk manufacturer's diagnostic utility on them. Also run memtest86+ to test the RAM.
Grab the memory dumps and throw then at the online analysis service below:

https://www.osronline.com/page.cfm?name=analyze

Might tell you something useful.
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The thing is they exhibit the symptoms simultaneously .. same day
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I will try these things .. Any way of accessing them in safe mode remotely ?
When you installed did you put SP 1 and the Convenience Rollup Pack on them straightaway?  (I'm assuming your image is only Windows 7 by itself).

SP 1 https://www.microsoft.com/en-us/download/details.aspx?id=5842

Servicing Stack next  https://support.microsoft.com/en-us/kb/3020369 (is required before the Rollup Pack)

Convenience Rollup Pack (first link is the 64 bit one and the second one is the 32 bit one)  http://download.windowsupdate.com/d/msdownload/update/software/updt/2016/05/windows6.1-kb3125574-v4-x64_2dafb1d203c8964239af3048b5dd4b1264cd93b9.msu  or http://download.windowsupdate.com/d/msdownload/update/software/updt/2016/05/windows6.1-kb3125574-v4-x86_ba1ff5537312561795cc04db0b02fbb0a74b2cbd.msu
plse post the dmp file here
find it in windows\minidumps
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I have gone into last known good config .
Gotten back in .. Removed the windows rollup .
Will see if that fixes it .
How do I get windows to reject the update going forward .
If it breaks windows I dont need it .
Andre, why don't you post the dmp file here?  then we can probably tell you what the cause is