I used rufus to burn a usb to make it into a bootable usb for elementary OS 5.0 Juno with which I was hoping to be able to dual boot elementary OS 5.0 Juno with my already existing windows 10. However, when I boot into the usb and select Install elementary OS it show a screen where it shows some sort of error, something about "couldn't read" for like 2 seconds and goes away then nothing happens. I tried the other options as well but nothing worked. Do you know what I should do?
Download the iso directly from Elementary OS website. Get rid of the rufus. Download balena etcher, install it and run it to make bootable stick using the usb drive and downloaded iso file. Turn off fast boot in power management in Windows. Make in Windows disk manager empty space for Elementary OS, but do not format it. During the installation just select this empty space to tell Elementary OS to install there. So as far as I remember it is not the first automated installation, not the third option with the manual partitioning but the second which allows to install Elementary OS alongside with Windows.