Upgrade to Windows 10 Pro - Failed

[dronkula]

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?

 

[zack251]

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.

 

[Jikangire]

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.

 

[2uiam]

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

 

[2uiam]

https://www.reddit.com/r/windows/comments/3eyrre/fix_for_the_80240020_error_when_trying_to_install/

this worked for me

 

[jojoe42]

What I did (now installed on SP2, and you better be happy with bugs ) 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!!!

 

[anon(9435020)]

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