CPU usage 100% but system idle process says otherwise

  1. Posts : 15
    Microsoft Windows 10 Pro 64-bit
       21 Jan 2017 #1

    CPU usage 100% but system idle process says otherwise

    Hello, So I was copying a large group of files (400 gigs) to an external drive, it was about 150 gigs in when the PC crashed ( i believe due to MSI usb speed up), i've since removed the MSI program but CPU usage stays at 100% from the moment the PC turns on, however system idle process shows it's using most everything which is good, and PC perfomance is normal and unlike if CPU usage was actually 100%, but I can't figure out how to fix this, any suggestions or tips would be so helpful, I've attached screen shots showing 100% usage but every program running doesn't add up to near that and system idle showing everything mostly idle. Thanks!!!!!

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      My ComputerSystem Spec

  2. Posts : 15
    Microsoft Windows 10 Pro 64-bit
    Thread Starter
       21 Jan 2017 #2

    If its worth noting performance manager also only shows ~10% usage
      My ComputerSystem Spec

  3.    21 Jan 2017 #3

    What build are you on? as I had this on two PC's prior to the Anniversary update at a guess system Idle is missing from the list?
    I put it down to a Microsoft bug at the time as Sysinternals Process Explorer was not showing 100% and was showing system Idle.
    As the Anniversary Update seemed to have fixed it I assume it was something related to MS as never been able to find a 100% reason for it, just lots of half cock theories.
      My ComputersSystem Spec

  4.    22 Jan 2017 #4

    maxatv do you use windows indexing and cortana? And something tells me you have a lot of start up program set to run that doesn't need to be
      My ComputerSystem Spec

  5.    22 Jan 2017 #5

    If it's System Idle Process taxing your CPU then you don't need to worry because it means that the cpu usage isn't hogged at all but at idle state.
      My ComputerSystem Spec

  6. Posts : 15
    Microsoft Windows 10 Pro 64-bit
    Thread Starter
       23 Jan 2017 #6

    Right, I know CPU usage isn't actually high and performance was still great, trying to fix it I put the computer in diagnostic mode and couldn't get it out, I reformatted it since files were on D and E drives, all seems good now, not sure what caused it. But did get a boot up crash so maybe i'm not clear just yet
      My ComputerSystem Spec


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