Solved CPU Usage shows too high %

C

churin

Member
The Task Manager shows CPU Usage of around 50%. No apps is being up. The Start Up apps on MS Config are all turned off. Icons shown on the System Tray are speaker, network, AV and IME. The CPU usage of around 50% does not appear any transient phenomina which may be caused by app software automatically running in the background. I have just run AV for full scan but no virus, worm or spyware detected.(AV is Symantec Endpoint Protection 11).

The PC is a dual CPU system running Vista Ultimage SP2b and thus the Task Manager displays two CPU Usage Histories. One of them shows about 30% and other one shows about 75%. The Processes on the Task Manager shows System Idle Process 80% to 97% but the CPU Usage on the status bar shows around 47% to 60%. I think the CPU Usage under the above described condition should be 0 to 3%. I wonder what the problem is. Could anyone shed light on this?
 

My Computer

System One

Hello Churin,

You might check in Resource Monitor under the CPU section to see if it can help you track down what is using up so much of your CPU.

Other than malware, the usualt culprits are Disk Defragmenter, Index, Sytem Restore creating a restore point, antivirus program, 3rd party anti-malware type program, etc.....

Hope this helps,
Shawn
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
Brink said:
Hello Churin,

You might check in Resource Monitor under the CPU section to see if it can help you track down what is using up so much of your CPU.

Other than malware, the usualt culprits are Disk Defragmenter, Index, Sytem Restore creating a restore point, antivirus program, 3rd party anti-malware type program, etc.....

Hope this helps,
Shawn
Click to expand...
The Resource Monitor shows System Interrupts is taking 25 to 30% of CPU. The description says "Deferred Procedure Calls and Interrupt Service Routines". What exactly does this do?
Edit: The above is not for Vistax64 but W7x64 which has similar problem. On Vista x64 SP2b, Resource Monitor shows that System whose description is "NT Kernel & System" is taking 0 to 7 % of CPU. There a couple of others items which sometims take 0 to 1.
 
Last edited:

My Computer

System One

Churin,

I must admit that I'm at a loss on what that is suppose to be.

The only thing I can suggest is to see if doing a System Restore using a restore point dated before you had this issue can fix it for you.
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
The culprit is found to be a NIC. I disabled it on the Device Manager and the cpu usage immediately went down all the way to zero. This is an integrated NIC but it was previously found unstable on x64 OSs so I installed an external NIC. At that time I disabled the internal NIC on BIOS but later at some point it was enabled again probably to use it on WXPx86 or W2K (The PC is quadruple boot system). I switched the OS back to Vista but forgot about the integrated NIC having been enabled. I was not aware that the NIC causes this problem if left enabled.

Thank you so very much for your help.
 

My Computer

System One

Churin,

I'm happy to hear that you got it sorted out. I have not heard of that one either, but I suppose that if it was not compatible with x64 it would make sense then.
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
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