1. dronkula's Avatar
    Hi,

    Just wondering if I should be worried yet - checking windows update and looking at the installed update log I've twice now already today had the message that Upgrade to Windows 10 Pro - Failed.

    I'm upgrading from Windows 8.1 Pro.

    Should I just leave it and trust Microsoft to get this fixed and check later today? Or download the ISO and do a clean install?
    07-29-2015 02:12 AM
  2. zack251's Avatar
    I have this failed messages via the Windows Update history. I am guessing the system is still downloading the necessary files in the background. But I don't really know for sure.
    07-29-2015 02:17 AM
  3. Jikangire's Avatar
    When checking my update history in Windows Update I see that the Windows 10 update attempted 5 times already, (in the background mind you as I was never myself prompted to start the update), and failed each time. After much research I found that disabling my anti virus program, (in this case Bitdefender), and then running the "wuauclt.exe /updatenow" from the Administrator: Command Prompt, my computer is now downloading and preparing to install the Windows 10 update.

    EDIT: After getting to 100% on the "Preparing to install" phase, I then got the following error:

    Some updates were not installed
    Failed: 1 update
    Error(s) found:
    Code 80240020 Windows Update ran into a problem.
    Last edited by Jikangire; 07-29-2015 at 03:23 AM. Reason: Added error message
    07-29-2015 03:17 AM
  4. 2uiam's Avatar
    Hi,

    Just wondering if I should be worried yet - checking windows update and looking at the installed update log I've twice now already today had the message that Upgrade to Windows 10 Pro - Failed.

    I'm upgrading from Windows 8.1 Pro.

    Should I just leave it and trust Microsoft to get this fixed and check later today? Or download the ISO and do a clean install?
    How to: 10 things to do if Windows 10 Setup fails. - Microsoft Community
    07-29-2015 03:35 AM
  5. 2uiam's Avatar
    07-29-2015 04:31 AM
  6. jojoe42's Avatar
    What I did (now installed on SP2, and you better be happy with bugs :P) was type wuauclt.exe /updatenow into the command prompt and check for updates. If that doesn't work, run the in-built troubleshooter which will reset a few components and (for me) got the ball rolling. Also make sure you're plugged in!!!
    07-29-2015 06:48 AM
  7. Birgitte Sciarretta's Avatar
    Or go here and use the Media Creation Tool. You can either upgrade directly or create a USB-stick/ISO to upgrade later.

    Windows 10
    07-29-2015 10:48 AM

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