I'm back on the case but nothing has changed. Fast boot is off, I can't find any reference to secure boot in the bios, I've been out and bought a brand new flash drive then I've downloaded mint 21.3 from a different mirror. The live mint loaded without trouble, I clicked on the install mint and it took twenty minutes before the installation screen appeared, I selected my keyboard layout (English UK) and again I'm just watching a spinning logo ( ten mins so far and counting) to make thing worse I tried it on my laptop, I was going to do a fresh install on the laptop anyway but I had exactly the same problem . I gave up on that but found the laptop now won't boot at all. The laptop did have secure boot off and it was set to uefi so I tried changing it to legacy and then both, nothing helped. Back to the desktop it does say it's now copying files, I will see how long that runs for and post back