How to Cancel Windows 10 Update in Progress if Windows Cannot Boot * In this tutorial you 'll find detailed instructions, on how to bypass the 'It looks like you started an upgrade and booted from installation media' message, by canceling the currently running update process of Windows 10, in order to perform a Windows 10 repair upgrade from the installation media. In general, the above message isn't a problem, but becomes a big problem if the Windows update fails to install or if Windows 10 stuck on loop after trying to install updates, and you want to repair the Windows 10 by booting from an installation media.
As the message indicates, if you want to perform a clean installation of Windows 10, you have to select 'No' to continue, otherwise, remove the installation media and click 'Yes' to continue the Windows 10 upgrade. The above error message means that you have interrupted the Windows 10 upgrade once its started. If you want to perform a clean installation instead, click No'. If you want to continue with the upgrade, remove the media from your PC and click Yes.
The following issue may appear if you try to perform a clean installation or a repair upgrade of Windows 10 from an installation media: 'It looks like you started an upgrade and booted from installation media.
