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I am trying to figure out how to get my computer to boot from USB. Here's the issue. In BIOS I have put the USB on top, CD second and hard-drive third for boot order. But it will not boot from the USB. When I press F12 it doesn't show the USB at all, just the CD and hard-drive. When I am in the operating system (Ubuntu) and before that Windows 10, the USBs work fine. So I know that the USB connectors are connected inside my computer. I am completely baffled and befuddled. Please help. Thank you.

  • Is the USB well made to boot? – George Udosen Nov 15 '17 at 4:50
  • test the usb-thumb-drive in another machine to ensure its bootable – guiverc Nov 15 '17 at 4:53
  • Yes, I checked the USB on my wife's computer and it worked just fine, it's my computer. – William Bond Nov 15 '17 at 4:54
  • In order for modern UEFI systems to boot a USB it must be GPT partitioned and contain an ESP with an EFI application. If the BIOS doesn't find all that it doesn't think the USB is bootable. – jdwolf Nov 15 '17 at 5:09
  • What tools did you use to make the USB into a bootable drive? – jdwolf Nov 15 '17 at 5:09

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