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Booting Spectre x360 Convertible from USB CD/DVD Drive

Spectre x360 Convertible
Microsoft Windows 10 (64-bit)

I recently purchased the HP DVD 600s external drive to attach to the HP Spectre x360 Convertible laptop but am unable to get the laptop to boot from a CD or DVD.  I've disabled secure boot in the bios and moved the CD option to the top of the list in the UEFI boot order but booting up bypasses the CD/DVD drive, goes straight to the hard drive, and starts Windows instead.  The DVD disc boots fine on another computer.  My laptop product number is T629UA#ABA.  Please help.  Thank you.

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Booting Spectre x360 Convertible from USB CD/DVD Drive

Have you tried tapping esc as you power up to get to the startup menu and choose boot device (F9 I think)?

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Booting Spectre x360 Convertible from USB CD/DVD Drive

Yes, I have tried ESC F9 but the menu that follows doesn't list the CD/DVD ROM drive as an option unfortunately.

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Booting Spectre x360 Convertible from USB CD/DVD Drive

Try all the usb ports. I just had this issue myself where the laptop would only boot with a usb external DVD drive when plugged into the sole USB 2.0 port. You might also try looking in the BIOS and see if there is a setting for USB 3.0 preboot and turn off USB 3.0 before Windows loads. 

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Booting Spectre x360 Convertible from USB CD/DVD Drive

Was just able to get USB CD/DVD to appear in the F9 boot menu by:

 

disabling secure boot mode

enabling legacy boot mode

making USB CD/DVD option first in both the UEFI and legacy sets of boot options

 

Not sure why it didn't show up initially- maybe the legacy mode option is what fixes it.

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