My PC starts by itself


  1. Posts : 99
    Win 7 Professional 64bit
       #1

    My PC starts by itself


    I've got a new PC, Win7 Professional came pre-installed.

    Now it's the second time that it has started itself while I was away. I hadn't even known that was possible!

    Could that be the effect of some malware?
    How can I find out what the stupid thing has been doing while it was active without me?
      My Computer


  2. Posts : 72,050
    64-bit Windows 11 Pro for Workstations
       #2

    Hello Esha,

    Oh yes, there's several things that can wake up your computer to do whatever task.

    You might check your wake source log in Event Viewer to see if it may reveal what is waking up your computer.

    Wake Source - Read Event Viewer Log

    Hope this helps for now, :)
    Shawn
      My Computer


  3. Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       #3

    Yes malware can cause this. It could be calling home. If your computer is set to sleep and a auto update kicks in could also cause it. I know of no way a program can do a cold boot. (Computer OFF)
    The first place I would look is Windows Updates and see if it set to auto check for Updates. Then I would check if your anti virus is set to auto update.
    If you are concerned with infection I would do this in this order.
    1. Run a updated full scan with your anti virus.
    2. Run a updated full scan with MAM
    3. Run a updated full scan with Eset
    ---------------------------------------------
    Malwarebytes

    Free Online Virus Scanner | ESET
    -----------------------------
    Sorry I'm slow.
    Last edited by Layback Bear; 05 Dec 2012 at 15:50. Reason: added line
      My Computer


  4. Posts : 757
    Win10 Pro 64-bit
       #4

    Check all your BIOS settings thoroughly. Some - like my ASRock does in "Advanced Chipset Configuration" - have "alarm" type settings that will boot the rig up if activated.

    "RTC Alarm Power On
    Use this item to enable or disable RTC (Real Time Clock) to power on the system."
      My Computer


  5. Posts : 9,606
    Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
       #5

    There are some other Bios settings, too. ReStart computer after electrical power failure, wake on modem ring, wake on Lan, etc. These can be turned ON or OFF in the Bios setup.
      My Computer


 

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