Thanks to the developers, for their excellent efforts. From what little I have used the 4.3 release candidate, I like it.
If I use my own recently downloaded Fedora 42 Workstation, (Not the Fedora 42 -full Template) then the live version boots, Installs and will restart.
Other ISO’s, like Pure, Ubuntu 24, on trying to start in the standalone give error message. No Grub. No Boot.
I have allocated drive 20 gb, max 30GB. with differerent efforts. 4, 8, 16 GB RAM.
I must have missed doing something in the correct order.
Maybe some new feature regarding handling of UEFI? Maybe Developers feel other Linux OS’s represent a Security Risk?
I can, I guess, put a Grub on standalone Qube, and install into it a link to what ISO I want to install
Computer is T480, I7, 32 GB RAM. 256GB SSD with freshly installed version of Qubes 4.3, latest release candidate. Nothing else on drive-- lots of space available on SSD.
Thanks for reading this.