Thank you for posting in the HP Support Community.
This may happen because of variety of reasons:
- the PC does not recognize the DVD you are trying to use as bootable one - it is not written properly to be able to boot it from
- settings from the BIOS
I am kind of excluding the option for DVD device corruption because Windows can see it. Are you able to indeed read the DVD from within Windows ?
Can you provide more information about what you are trying to boot from ? How did you write the DVD ? Any details or even pictures from your camera/phone would be great.
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