Windows takes a very long time to boot after update - about 15 minutes

  1. thewizardoz's Avatar
    Posts : 134
    Windows 10 Pro x64 Insider Preview Build 18875.1000 20H1
       #1

    Windows takes a very long time to boot after update - about 15 minutes


    Windows takes a very long time to boot after 18975 update - about 15 minutes to the Desktop!

    CPU-Z shows CPU running at 3.2Ghz got 32GB RAM 2 x 2T SATA drives.

    I've run SFC and all DISM commands probably 30 times each but neither find anything!

    I even ran a repair install of this new version but no luck finding anything!

    I've spent two days on this and found nothing that might be causing this.

    Any ideas please anyone!!

    Thanks.
    Last edited by thewizardoz; 09 Sep 2019 at 05:05. Reason: missing info
      My Computer

  2. Ztruker's Avatar
    Posts : 13,607
    Windows 10 Pro X64 21H1 19043.1110
       #2

    Here is some info I have on how to debug slow boot problems.

    Download and install the Windows ADK, which also contains the Windows Performance Toolkit.

    1. Open a Administrator Command Prompt.
    2. Type: cd "%programfiles(x86)%\Windows Kits\10\Windows Performance Toolkit"
    3. Type the following command to start recording the boot trace:
    wpr -start GeneralProfile -start CPU -onoffscenario Boot -onoffresultspath c:\wpr -numiterations 1 -filemode
    4. The results should be in a .etl file under the C:\WPR.

    You can also run this via the GUI:
    Start Menu
    ..Programs
    ....Windows Kits
    ......Windows Performance Toolkit
    ........Windows Performance Recorder


    More good info here: How to collect a good boot trace on Windows 10 or Windows Server 2016 using WPRUI

    See here for some hints on how to use the data: Analyzing a Slow Boot with Windows Performance Recorder & Analyzer

    ... and here: Windows Performance Analyzer step-by-step guide


    There are one or two people here who are very good at analyzing boot traces but I can't remember names, sorry. Hopefully someone else can.
      My Computers


 

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