Question Laptop will boot from the HDD but not from a CD or from a bootable thumb drive

[Moondoggy]

I'm looking for a solution to a problem I created somehow. My problem is that my old HP-15 laptop that I was using for testing, will no longer boot from a thumb drive. It booted from my thumb drive prior to me flashing the BIOS from V13 to V22. In addition to not booting from a thumb drive it will no longer boot from a the built-in CD drive using a bootable disc. The only thing it will do now is boot Windows 10 Home from the internal hard drive. Please note that I have gone into the EUFI Bios and insured that the USB device was 1st in the boot order followed by the internal CD-ROM drive and then the internal HDD. I have also tried enabling legacy mode and making sure the boot order was the same and I have tried disabling the secure boot option and regardless if what I've done and tried, the laptop still only boots from the HDD. Unfortunately, I cannot restore the BIOS back to V13 as that version is unavailable and I can't go to HP for help as the device is no longer supported.

So, is there any technical wizard that can tell me how to resolve this problem or suggest another, alternative that will restore the ability to tell the laptop which device to boot from? Whatever solutions might be available they would have to install it by invoking the installation form within Windows 10.

Any help would be greatly appreciated.
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[KingLoki]

Can you view the contents of usb and cd drive in file manager?