After pressing/holding ESC key during startup you need to select the bootable USB stick from the Boot Manager option in the bios splashscreen, this is the only way i have ever been able to successfully boot on my Vi8, ive only been successful in booting Windows 10 USB installers after creating them with the official Microsoft download tool,USB’s created with Rufus or the old Microsoft USB creator refused to boot either, for whatever reason only the Win10 downloader tool is able to create a bootable USB compatible with this particular tablet
