So for anyone reading this in the future I am going to make a couple points (as this is not something magical). Just facts which have not been revealed yet. When you go to install any Operating System you need to consider:
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Make sure you update your bios to the latest version (this will help with firmware bugs where boot may not work correctly.
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Consider that your initial bios settings (e.g. if you dual boot with Windows) may affect how your USB Boot configuration is considered:
- UEFI Compatibility\Legacy mode.
- Secure Boot
- Windows Fast Boot being turned on.
I feel what is causing some confusion in this scenario is the USB Key boots once into the Linux\Endeavour OS install and then does not work again. This is purely the interaction between the BIOS of the computer and the USB key. I have seen this happen on plenty of Lenovo and other laptops which support UEFI Legacy modes. I end up having to go into advanced setting of the bios to reset things so the USB Key can be detected.
Lots of Articles here:
That being said @kiamlaluno partially hit the nail on the head. So Rufus can write USB keys in the UEFI compatility modes. This utility has just caused me issues writing non windows ISOs. So I don’t recommend you use Rufus.
I have switched to using Ventoy on my USB key. I write it to my usbkey. Then anytime I have a new ISO … I just manually copy it to my USB key and Ventoy will pick it up in the boot menu.