Dell M4800 restarts instead of shutdown and sleep - Windows 7 x64

[kelese]

So, is there any option to detect the root cause of problem?

 

[jcgriff2]

What exact problems are you left with?

We have done everything possible with the dumps at this point.

Regards. . .

jcgriff2

 

[xilolee]

I found a similar topic on tomshardware.co.uk - Computer restarts instead of shutting down during 'Turn off' (click)

Last user said he disabled (asus asrock) Instant Boot on its machine, to solve its problem.

Did you check/installed Dell software for your Precision M4800 here (click) ?
Guessing, on your machine the possible culprit could be "Dell Command | Power Manager".

Other suggestions found:
1) device manager: keyboard HID and Mouse HID, Network adapter > power management, untick "allow this device to wake up computer".
2) My Computer - properties - advanced system properties - startup and recovery, settings - untick "automatically restart on system failure".
3) Virus scan to remove malware.
4) bios: disable wake up on lan , or disable any setting that can bring the computer up from sleep.