Mystery CPU usage in Windows 7

Discussion in 'Windows 7' started by kilton, Aug 14, 2009.

  1. kilton

    kilton MDL Novice

    Jul 30, 2009
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    #1 kilton, Aug 14, 2009
    Last edited: Aug 14, 2009
    I'm seeing constant 8% CPU usage in Task Manager even though nothing in the Processes tab reports such usage. The attached image is with the CPU column sorted -- the top application is using 1%, but at the bottom you can see that 8% of the CPU is being used. When I looked on the Performance tab, about 45% of one of the CPU's eight threads is in use at all times.

    Anyone else seeing this?
     

    Attached Files:

  2. SirSilentBob

    SirSilentBob MDL Senior Member

    Jun 5, 2009
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    Can you post a bigger pic? Can't see a damn thing in that tiny one! :)
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. wesh

    wesh MDL Novice

    Aug 14, 2009
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    hey there,

    maybe one of the gadgets that come pre-installed is using your cpu resources. Could also be some software running hidden on the background. Type " msconfig " in the run command and check which applications run automatically on start-up and disable any unneeded one.
     
  4. kilton

    kilton MDL Novice

    Jul 30, 2009
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    Bigger picture posted. :)

    I actually just turned off Digsy's spyware -- that's what got me looking at this. If it were Digsby or any other program, shouldn't it show up under Processes?
     
  5. Besstheone

    Besstheone MDL Novice

    Apr 27, 2009
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    hi may be u can check show process from all users :)
     
  6. Ajavas

    Ajavas MDL Novice

    Sep 19, 2008
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    :) It's probably the Indexing Service running in the background....;)
     
  7. kilton

    kilton MDL Novice

    Jul 30, 2009
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    Oops, forgot about this. Here's an image with all processes. It says 'idle' is using 98%, but CPU usage at the bottom says 9%.
     

    Attached Files:

  8. Rodzilla_16

    Rodzilla_16 MDL Novice

    Aug 1, 2009
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    Agree with this user. Click "Show processes for all users" so you can see the system processes.
     
  9. kilton

    kilton MDL Novice

    Jul 30, 2009
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    So no one else is seeing this in Task Manager? If not, that makes me feel better because it must be something I have installed (rather than Windows itself). Kind of sucks that the Processes tab doesn't show it -- maybe a bug?
     
  10. twiz

    twiz MDL Senior Member

    Jul 30, 2009
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    My "CPU Usage: ##%" is typically higher than the added processes, but not by much maybe +5~10% at most normally, 2~4% with 'Show Processes from All Users'.

    If I were to make a guess, it's the 32/64bit mixed apps (if you indeed are running both).
     
  11. kilton

    kilton MDL Novice

    Jul 30, 2009
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    Interesting, thanks. I wasn't aware that mixed apps could be a problem. Do you happen to have a link handy on this?
     
  12. kilton

    kilton MDL Novice

    Jul 30, 2009
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    I just looked in Resource Monitor and the extra 8% is due to System Interrupts. Interesting -- at least that's progress.