Why Windows server 2012 restars on its own and cant stop restart process ?

Hello Experts,
This windows server 2012,
restarts on its own,
Shutdown -a does not help
what can we do in this case ?
RGuillermoProject ManagerAsked:
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WiReDWolfCommented:
Is this a VM? Physical Host? How far in the boot process does it get before it resets?  Have you had a chance to look at logs (assuming it stays booted for a little while)?

With all Windows systems you should be able to hit F8 before startup to dictate startup behaviour - such as boot to safe mode, safe mode with networking, and importantly, stop rebooting if stop error encountered.

Also, is it actually restarting (performing a full shutdown before starting back up again) or resetting?
noxchoGlobal Support CoordinatorCommented:
If it restarts then there is a reason for it.
Go to Computer Advanced properties - startup and recovery - configure it to show BSOD screen and generate a minidump file. It can be that your server is crashing. If nobody is manually restarting it.
RGuillermoProject ManagerAuthor Commented:
Wire D wolf
its a physical host.
it resets every few days. can't tell exactly
will check the logs tonight that I get a chance.
I am in a remote location
Will ask those things to technicians in place.
What s the difference between a full shutdown and restart or just resetting? how to detect that?
Noxcho
Configuring for BSOD tonight
Coming back with results in 12 hours...
Thank you, Experts!
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WiReDWolfCommented:
Ok, it sounds like it runs for a few days before randomly resetting.  In that case I recommend using the BlueScreenView application:

https://www.nirsoft.net/utils/blue_screen_view.html

Likely you do already have dump files and this is an excellent way to parse the data from the dumps into something that will show you the core of the issue.  Typically it's a DLL gone bad or a driver.

If you do look in your System logs, you may see an event that says "the previous shutdown was unexpected".  If you do see that, the server is suffering a hard reset.  Sometimes you can see from the events preceding what triggered the issue, but the BlueScreenView app is more reliable for sourcing out why a system suddenly dumped.
RGuillermoProject ManagerAuthor Commented:
GReat testing Blue Screen View too, tonight...
 thank you!
Dr. KlahnPrincipal Software EngineerCommented:
If there's nothing in the event logs then it's likely to be a hardware problem.  Bring up your cold spare, move the system disk to the cold spare, and see if the problem persists.  If the problem goes away then it's hardware.  If the problem persists then it's software.
RGuillermoProject ManagerAuthor Commented:
good to know Dr. Klahn
Thank you
Testing now...
Dr. KlahnPrincipal Software EngineerCommented:
... of course since this happens only infrequently, it'll be some time before it's clear what the situation might be.
nobusCommented:
post the dmp file here for more info
find it in Windows\minidumps
DanOwnerCommented:
is this after you have logged into it?  that is a new trick for 2012, after you login it gives you a count down.  I think i's an update thing, you can run this to shut down the timer, if thats it.

NET STOP WUAUSERV

Just make sure you restart updates later.

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RGuillermoProject ManagerAuthor Commented:
Each advice was so useful !!
Opened a lot of doors also

The main problem is solved
Thanks to all Experts !!!!!
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