pc sometimes restarts instead of shutting down

Stefan_7

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Oct 31, 2015
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From windows I click it to shut down but sometimes ( didnt notice it happen always) it just actually restarts. I have to shut it down again and then it works.

the case power and restart buttons work

I looked in event viewer trying to check for some errors but didnt notice anything, where should I look exactly?

win7 64bit, seasonic 620w psu, i5 4460, gigabyte b85hd3

I used the same windows on an older pc and I didnt have this problem

default f2 bios

mobo drivers updated

did a bit of benchmarking and gaming and system is stable

it's a new pc.
 
also I noticed that after staying a while in sleep it suddenly turns back on from sleep to the windows user screen kinda like this http://cloud.addictivetips.com/wp-content/uploads/2011/05/Logon-Screen-Date.jpg I dont have the 'on resume, display logon screen' ticked in screen saver settings btw

it happens after like 30 mins or more. Hibernating is off. Sleep timer is 20mins and I was afk for much more than that so something else must be the trigger.
 


u mean option AC BACK? it is Always off

btw would it have something to do with haswell's c6-c7 power mode? my psu isnt compatible and there should be a bios setting for this but i can not find it