I have downloaded ubuntu-20.04-desktop-amd64.iso and made a bootable stick. My win10 notebook startdt to boot but eventually stopped with the message: BusyBox v1.30.1 (Ubuntu 1:30.1-4ubuntu6) built-in shell (ash) Enter 'help' for a list of built-in commands. (intramfs)
what is wrong?
Remake a different Ubuntu version LiveUSB for testing on that USB Flash drive.
Get an ISO file for a supported 'flavour' of 20.04 with a different Desktop (not the standard Ubuntu GNOME). Download @ https://ubuntu.com/download/flavours .
The ISO used to make a LiveUSB should be checked for download errors as per Canonical's instructions.
Make it following Canonical's (Ubuntu's publishers) instructions on Ubuntu, on a Windows PC or on a Mac.
Once you remake the LiveUSB, boot from it, and see if the problem still occurs.
