Can't boot from DVD on Dell Inspiron 3646

A client of mine has a brand new Dell Inspiron 3646 win 8 PC that he put a windows password on and forgot the password. I have a bootable DVD app that resets the password. I restarted the PC, pressed f12, that goes into the boot manager.  The current boot mode is secure UEFI.  The DVD drive is not listed. If I select Change boot device setting, and select Legacy boot mode, save and reboot, it restarts and says no boot device found.
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Tony GiangrecoAsked:
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Seth SimmonsSr. Systems AdministratorCommented:
does the dvd boot on another system?
does another dvd boot on this system?
did you disable secure boot?
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noxchoGlobal Support CoordinatorCommented:
This is protection on UEFI BiOS systems that booting from DVD media is prohibited via Secure Boot. Disable the secure boot and you will get the booting DVD.
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Michael DyerSenior Systems Support AnalystCommented:
Here are the steps:

Insert the DVD in the CD/DVD drive.

When you see the Dell logo center of screen, press "F2" continually to enter the Setup Menu.

Click Boot Tab - Secure Boot default is Enabled - needs to be Disabled.

Restart PC at Dell Logo, press F12 to get to Boot Manager Menu - Select DVD.

You should now boot from the DVD
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Tony GiangrecoAuthor Commented:
Seth Simmons: Yes, it boots my Dell Pc and my HP Laptop
noxcho: Yes, I tried that
Michael Dyer: it's F12, not F2 and I already tried that.
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nobusCommented:
here is how to disable secure boot :  https://technet.microsoft.com/en-us/library/dn481258.aspx

if that does not help - try the methods here :  https://www.youtube.com/watch?v=2OCpJP4Eh88
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noxchoGlobal Support CoordinatorCommented:
noxcho: Yes, I tried that
Does it mean that SecureBoot is now deactivated? Because you wrote in your original post that SecureBoot is ACTIVATED.
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☠ MASQ ☠Commented:
Secure Boot and UEFI > Legacy Boot Options need changing separately
Here's your Menu:
UEFI screen in BIOS setup
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Tony GiangrecoAuthor Commented:
They replaced the PC, end of problem.

Thanks for the suggestions.
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Tony GiangrecoAuthor Commented:
The suggestions didn't work and they just replaced the PC. Thanks for the help!
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