Hi,
You need to identify whether the problem is your disk.. or your BIOS settings, as you know.
So take the problem apart.
a. Is your USB drive bootable on any other Windows machine?
Put another way, people make mistakes creating these.
And/or
b. Do you have a known usable bootable USB of any sort you can use to check it boots on your problem PC?
Here's another way to create a bootable USB drive:
Creating a bootable USB drive.
with thanks to @NavyLCDR
To reliably make a bootable USB flash drive from an ISO file, do this:
Plug the drive into a USB port of a functioning Windows PC.
Open a command prompt.
Run diskpart.
Once diskpart is running, enter the following commands in sequence:
list disk
select disk #
- replace # with the actual disk number of the USB flash drive
clean
- this will erase the selected drive, make sure it is the USB flash drive!
create part pri
format fs=fat32 quick
active
exit
exit
Then mount your ISO file.
(By default you can simplyright click the iso file, and click Mount. However, Mount will not be available if iso files have been associated with a different program).
Copy all the files and folders from the mounted ISO file to the USB flash drive.
(If stuck you can open the iso with 7-zip, a free program).
Discussion here:
- includes content of flash drive.
OR use Rufus (freeware)
See Option 2