It happens while iam away for long time. especially lets say i start it, leave it without touching anything and when i turn back after hours it is OFF. why?
lol no . we went out together. i started PC. then used it like 3 minutes. it was OFF. iam sure no electric issues because there is a device at home which points if electric was OFF and then CAME BACK. But indeed if my PSU is broken dont know?
Have a look at Event Viewer and see if you have some critical errors, maybe it's BSOD'ing and shutting down.
Like writed upper, look on the event viewer ( administration tools ) what have happend, if the pc have shut down, it is write there.. Its maybe not even a BSOD or critical error, but it will tell you why windows have shut down. ( could be a problem when the pc is in sleep / low power mode ). I can imagine you had not get any message when starting the pc again ?
no i dont have any message while starting the PC. i will view event viewer now thanx. edit :is it Windows Logs --> System? it is full of >Error DCOM got error "1068" attempting to start the service SafeBox with arguments "Unavailable" in order to run the server: {F681ABD0-41DE-46C8-9ED3-D0F4EBA19111} and in Setup tab Initiating changes for package KB2919394. Current state is Absent. Target state is Staged. Client id: WindowsUpdateAgent. and many other stuff. Package KB2919394 failed to be changed to the Staged state. Status: 0x800f0816. Package KB2917929 was successfully changed to the Installed state. in security An attempt was made to query the existence of a blank password for an account. my computer name is there. the LOGMEIN remote controller is tehre and GUESS is there..no idea what is this. in APPLICATION tab Error: Failed to poke open firewall for STEAM K found in APplications the time system shutdown and found this as last event Source ESENT wait last thing after this is Customer Experience Improvement Program data was successfully sent to Microsoft.
total OFF... edit: in ADMINISTRATIVE Events as i started PC it says this The previous system shutdown at 21:45:05 on ***8206;10.***8206;3.***8206;2014 was unexpected. at as last event log is 19:59 DCOM got error "1068" attempting to start the service SafeBox with arguments "Unavailable" in order to run the server: {F681ABD0-41DE-46C8-9ED3-D0F4EBA19111} edit 2: and is it good idea to leave ROUTER FIREWALL ON ? i also have BitDefender PRO. paid version. its Firewall is a bit aggressive :/
try this in CMD (run as admin) sfc /scannow DISM /Online /Cleanup-Image /ScanHealth DISM /Online /Cleanup-Image /RestoreHealth
On the event viewers, look the "System" log... ( maybe called administrator in the english version ( mine is in french ). Anyway, some error are normal, offtly you get a software / update who try connect and windows have not log the internet connection at this time. or if you have the DNS or any server / site , who take time to respond. I suspect your problem is coming from the low power state or sleep mode, maybe try disable them. But really hard to say like that what it can be. ( maybe corrupted driver / windows file ).
Hmm. I made balanced power option to its default settings. And she that sleep setup changed from never to 30 min. This morning there was no problem. And I must day this problem never happens while I use the pc. Anyway thank u guys.