Booting from usb with Qubes installed

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Hello,

I have installed Qubes as the base OS on an Acer Swift 3. I’m fairly new to Linux and I realised Qubes is overkill for want I really want to do.

I have since tried to create a fresh ubuntu install however I cannot get my PC to boot from the usb. In the Bios the only boot option is Qubes.

I have looked at Grub and it seems to only give me options for the hard disk. Listing (hd0) (hd0,gpt1), (hd0,gpt2), (hd0,gpt3) with ls.

Does anyone have any sugestions on how I might be able to remove or overwrite my qubes installation?

[fsflover]

Help! Cant boot from USB after first boot

I’ve installed Qubes installer on USB using rufus on factory reset windows 11 laptop. All my BIOS setting has been changed to what Qubes recommends. I installed Qubes with installer USB on another large and fast USB 3.0. Everything works fine and I can login to my profile and use Qubes however I want. But as soon as I log out, shut down and remove the USB, I cannot boot from it again. I shut down insert USB and go to BIOS but the USB is not in the boot from list even though I was able to boot fr…

[manpage]

Thank you,

With the instructions from that post I was able to install Ubunutu over qubes.