Unexpected shutdown/restart following software update requested restar

[Halloumi]

After a fresh install of Windows 7 Professional N x64 on a new build of my PC at the beginning of this year, the system was fine for a few months. This problem then appeared but was cured by a fresh reinstall of Windows about a month ago. However, the same problem has since reappeared and I do not want to go through the trouble of another reinstall, particularly as the problem has now reoccurred and is therefore likely to occur again even after another fresh install. So I would really like to get a solution to the root cause.

The unexpected shutdown/restart occurs only after a software update that requires a restart, I click the restart button that is presented and then 3 minutes after that restart/logon, the system suddenly and completely powers off with no warning whatsoever, then reboots automatically to the “Windows did not shut down properly” screen. Hitting enter starts the system normally and everything is then fine.

This problem occurs only and always after a software update that requests a restart and is after any software update that requires a restart – it has happened with Windows updates and application software updates.

A manual restart using Start > Restart is fine. Indeed, if I manually restart the machine immediately after the software update requested restart has completed, then the unexpected shutdown/restart does not occur.

“CNG Key Isolation Service has entered the running state” is always last entry in System log before the unexpected shutdown/restart.

A Kernel-Power event ID 41 appears in the System log after the unexpected shutdown/restart: “The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.”

All Windows updates, drivers, software, firmware & BIOS are up to date. The system runs fine in all other respects.

I suspect that some update or maybe an application that I have installed along the way has introduced this problem, but as not all updates or installations require a restart, then it is not obvious which one caused it and when.

Whilst I am not getting a BSOD with this problem, I have nonetheless attached the requested analysis files.

So does anyone have any ideas what may be going on here? I have searched extensively for answers but have not found anything conclusive yet or anyone else that is having this particular problem. Many thanks in anticipation of your suggestions.

 

[FredeGail]

Hello Halloumi & Welcome to SevenForums!

I do not see any .dmp attached in the .rar. For full instructions visit http://www.sevenforums.com/crashes-debugging/96879-blue-screen-death-bsod-posting-instructions.html.

Best Regards,
FredeGail

 

[Halloumi]

Hi FredeGail

I followed the BSOD Posting Instructions to the letter. Is it possible that the .dmp file is not there because I am not experiencing BSODs? As I said in my original post, the system completely and immediatley powers down with no indication whatsoever. Or does the .dmp file need to be enabled somehow beforehand?

 

[FredeGail]

Hi FredeGail

I followed the BSOD Posting Instructions to the letter. Is it possible that the .dmp file is not there because I am not experiencing BSODs? Or does the .dmp file need to be enabled somehow beforehand?

You'll need to enable them first! Check this page.

Set MiniDump

Best Regards,
FredeGail

 

[Halloumi]

OK I have now set the Minidump as you requested. Presumably I now need to wait for another instance of the problem to occur and then re-submit the report to you?

 

[FredeGail]

OK I have now set the Minidump as you requested. Presumably I now need to wait for another instance of the problem to occur and then re-submit the report to you?

That'd be great

Best Regards,
FredeGail

 

[Halloumi]

OK so I will need to find an update that requires a restart in order to initiate/reproduce the problem - I'm not sure how long this will take.

Incidently, when I enabled the Minidump I also unchecked "Automatic restart" so presumably what I was experiencing before was actually an unexpected shutdown followed by an automatic restart (rather than an unexpected restart).

I will post the new analysis as soon as I can reproduce the problem.