svchost.exe High CPU usage 98% of at least one CPU.

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  1. Posts : 5,440
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #1

    svchost.exe High CPU usage 98% of at least one CPU.


    I have had that message a couple of times whilst on the Forum. Haven't noticed it when I am doing anything else.
    Here's the info I get when I click on more details;

    Filename: svchost.exe
    Full Path: c:\windows\system32\svchost.exe

    ____________________________

    ____________________________


    Developers
    Microsoft Corporation

    Version
    6.1.7600.16385

    Identified
    21/11/2014 at 18:32:15

    Last Used
    14/07/2016 at 09:14:42

    Startup Item
    No


    ____________________________


    Many Users
    Millions of users in the Norton Community have used this file.

    Mature
    This file was released 6 years 11 months ago.

    Trusted
    Norton has given this file a trusted rating.


    ____________________________


    Source File:
    svchost.exe

    ____________________________

    Performance

    ____________________________

    Avg. Resource Usage: Low
    Avg. CPU Usage: Low
    Avg. Memory Usage: Low
    ____________________________

    Performance Alert

    Process ID
    444

    CPU
    98% of at least one CPU.

    Memory
    Normal

    Handles Count
    Normal

    Disk Read Activity
    Normal

    Disk Write Activity
    Normal
    ____________________________

    File Thumbprint - SHA:
    93b2ed4004ed5f7f3039dd7ecbd22c7e4e24b6373b4d9ef8d6e45a179b13a5e8
    File Thumbprint - MD5:
    c78655bc80301d76ed4fef1c1ea40a7d
    Here's a screenshot of Process Explorer which I think indentifies the problem. I'm just not sure what to do to rectify this.

    svchost.exe High CPU usage  98% of at least one CPU.-processexp.png

    Any help much appreciated.
    P.S. I have Malwarebytes Pro installed and running, I have also done a complete scn just to be safe!
      My Computer


  2. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #2

    Get the PID of the problematic svchost.exe process (586 in your screenshot

    Run Task Manger and right click on the matching svchost process and choose "Go to service"

    Let us know which services are running under it.

    svchost.exe High CPU usage  98% of at least one CPU.-tm.jpg

    If Windows Update shows up it's likely to be the culprit. You can confirm by stopping Windows Update Service via Start> Run> services.msc

    Stop then set startup type to disabled and reboot to test.

    Also worth a mention:

    Grab copies if these and run them:

    Svchost Process Analyzer

    svchost viewer

    The first one helps you check for anything out of the ordinary (malware running under svchost.exe) or unusual services configuration.

    The second one just breaks down each svchost.exe process into it's component services.

    Windows Update problem (if suspect can also be confirmed using RAMMap:

    Windows 7 updates

    How to remove Windows 10 upgrade updates in Windows 7 and 8

    Note: RAMMap must be run when the problem is actually happening.
      My Computer


  3. Posts : 5,440
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #3

    Thanks for the response. Getting a bit late now so will get to it tomorrow. Jusy one point there isn't a PID 586 in my screenshot. Did you perhaps mean "356"?
    EDIT: Had a quick look using Process Explorer and there is a Windows Update process in there . Will look again tomorrow as it is not showing high at the moment
      My Computer


  4. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #4

    Yes, sorry. I meant svchost.exe PID 586 PID 356 in your screenshot. The process might use a different PID next boot.

    svchost is how windows groups running services together and assuming that you do not have an unsigned malware process disguising itself as svchost.exe - the problem is likely to be with one of those services.
    Last edited by Callender; 15 Jul 2016 at 19:59. Reason: correction
      My Computer


  5. Posts : 5,440
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #5

    I think I 'm getting to the nub of the problem. The PID 356 does contain an "update service. Have run RamMap and here's a screenshot of the result after clicking "Active" tab

    svchost.exe High CPU usage  98% of at least one CPU.-rammap.png
    What's my next step?
      My Computer


  6. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #6

    Well that confirms that you've got the windows update high svchost.exe RAM usage problem. Solving the problem might not br straightforward. Many users report that installing some version of WU Client solves the issue.

    If you could possibly take a look at which Windows Update clients are installed it would help. Then for the last couple of months there have been other updates that also need installing to fix the problem.

    If you open an Elevated Command Prompt, start a PowerShell prompt and run the following it should produce a list.

    Windows Update memory leak, and random CPU spikes

    Use this after the Powershell prompt appears:

    Code:
    get-hotfix -id KB2990214,KB305026,KB3065987,KB3075851,KB3083324,KB3083710,KB3102810,KB3112343,KB3135445,KB3138612
    Here's mine for comparison:

    svchost.exe High CPU usage  98% of at least one CPU.-administrator_-elevated-command-prompt-powershell.jpg
      My Computer


  7. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #7

    You could also review this post:

    Slow updates

    Then check if any of the updates mentioned are missing.
      My Computer


  8. Posts : 5,440
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #8

    Many thanks. I'm out all day tomorrow, hospital appointment so may not get back until Tuesday.
      My Computer


  9. Posts : 4,776
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #9

    No problem. There are a few other members here who might be able to help too. It's a known problem but the fixes are varied and can be tricky.
      My Computer


  10. Posts : 5,440
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #10

    Am back for a short spell. More Hospital later. Here's the result of the Powershell:
    svchost.exe High CPU usage  98% of at least one CPU.-powershell.png
      My Computer


 
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