Windows 8 and 8.1 Forums


UEFI cannot boot from USB or DVD to install Windows 8

  1. #1


    Posts : 2
    Windows 8

    UEFI cannot boot from USB or DVD to install Windows 8


    Hey all,

    I just got a new HP ENVY dv7t-7200 CTO Quad that came pre-loaded with Windows 8. I wanted to install Windows 7 so I enabled "Legacy Support" in the BIOS which disabled UEFI mode. Everything went fine from there. I ultimately decided to go back to Windows 8.


    I found this guide but could not get my Windows 8 installation that I have on disc to load on startup: UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with


    I disabled "Legacy Support" in the BIOS so now UEFI mode is re-activated.
    My UEFI Boot Order in the BIOS is:
    CD/DVD Rom
    USB Drive
    OS Boot Manager



    But when I have the disc in and restart windows, it does not read the Windows 8 installation from the disc. If I press F9 to change the Boot Order it only shows:
    OS Boot Manager
    Boot from EFI File

    It should be noted that the it will recognize the disc if I'm not booting in UEFI mode.

    I could install Windows 8 again without UEFI but I would really prefer it. Any suggestions?

      My System SpecsSystem Spec

  2. #2


    Posts : 2
    Windows 8


    Solved -I went to System Recovery while starting up by hitting F11, then used the option to restore the comp back to factory settings. It installed Windows 8 in UEFI Mode
      My System SpecsSystem Spec

  3. #3


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    If you would like downgrade to Windows 7 in uEFI mode.

    Downgrade Windows 8 to Windows 7
      My System SpecsSystem Spec

UEFI cannot boot from USB or DVD to install Windows 8
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