1. #1

    High DPC Latency. Various drivers mainly SCSIPORT.sys, USBPORT.sys and nvlddmkm.sys


    I'm running Windows 7 and have sound crackling/popping due to high DPC latency.

    When I run sfc /scannow I get:

    Microsoft Windows [Version 6.1.7601]Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
    C:\Users\denzity>sfc /scannow
    Beginning system scan.  This process will take some time.
    Beginning verification phase of system scan.
    Verification 100% complete.
    Windows Resource Protection found corrupt files but was unable to fix some of t
    Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For example
    I ran the SFCFix.exe and here is my log.

    SFCFix version by niemiro.Start time: 2017-07-15 02:27:08.051
    Microsoft Windows 7 Service Pack 1 - amd64
    Not using a script file.
    SUMMARY: No corruptions were detected.
    AutoAnalysis:: directive completed successfully.
    Successfully processed all directives.
    Failed to generate a complete zip file. Upload aborted.
    SFCFix version by niemiro has completed.
    Currently storing 0 datablocks.
    Finish time: 2017-07-15 02:28:58.879
    Here is my .etl file http://naz.io/trace.zip

    So far I've tried:

    • Disabling USB 3 in BIOS
    • Disabled all network adapters in device manager.
    • Disabling my PCI raid controller
    • Disabling CPU throttling in BIOS
    • Updated BIOS to the most recent version
    • Applied all core Windows updates

    Any help at all would be very much appreciated as I've been pulling my hair out over this for nearly a month now. Thanks.

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  2. #2
    jcgriff2's Avatar
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    Re: High DPC Latency. Various drivers mainly SCSIPORT.sys, USBPORT.sys and nvlddmkm.s

    Update your video drivers.

    Make sure that your BIOS is up to date.

    If you have an Internet Security Suite (3rd party firewall) installed, remove it - Uninstallers (removal tools) for common Windows antivirus software—ESET Knowledgebase

    For help with SFC - Windows Update Forum Posting Instructions

    BSOD Posting Instructions - Windows 10, 8.1, 8, 7 & Vista ` ` `Carrona Driver Reference Table (DRT)
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