Windows 8 and 8.1 Forums


Downgrading bios problem

  1. #1


    Posts : 4
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    Downgrading bios problem


    Hi, I've recently been trying to downgrade my windows 8 to windows 7. Now I'm stuck at a point in the bios. I have thos option in my bios saying "OS configuration" which allows me 2 options; Windows 8 or; Windows 7/other OS. When ever I turn it on "Windows 7/other OS" I lose the ability to change the secure boot opion (it just dissapears) when I leave it on "Windows 8" I have no option to enable/see "cms".

    I tried legacy boots - didn't work.

    The desktop I'm talking about is a; Medion AKOYA P 5255 D md 8825
    It's running Aptio Setup Utility and American Megatrends Version 2.15.1227
    Bios date 12/13/2012 - Version: M7797W08.20F

    Any suggestions are welcome!

      My System SpecsSystem Spec

  2. #2


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


    Windows 7/other OS" I lose the ability to change the secure boot opion
    Windows 7 will not boot with Secure Boot.
      My System SpecsSystem Spec

  3. #3


    Posts : 4
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    Quote Originally Posted by theog View Post
    Windows 7/other OS" I lose the ability to change the secure boot opion
    Windows 7 will not boot with Secure Boot.
    Thanks for your reply!

    I know it doesn't boot with secure boot, but it wont boot when I switch it off either. The thing is that I cannot use CMS and secure boot at the same time. There is an option in my bios called "os configuration" and when I switch between those 2 options I either lose the ability to disable secureboot, or enable CMS.
      My System SpecsSystem Spec

  4. #4


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


    Your CSM options are

    "os configuration"
    Windows 8 or; Windows 7/other OS.
      My System SpecsSystem Spec

  5. #5


    Posts : 4
    Nothing


    Quote Originally Posted by theog View Post
    Your CSM options are

    "os configuration"
    Windows 8 or; Windows 7/other OS.
    Oke, so I already tried when I put the "OS configuration" on Windows7/other OS. Did the booting order, switched off secure boot and still it wont boot the Windows 7 installer. It just tells me "Reboot and Select proper boot device or insert boot media in selected boot device etc. I've put it on legacy boot btw.
      My System SpecsSystem Spec

  6. #6


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


    Boot the Windows 7 x64 DVD in UEFI or Legacy mode.

    Click image for larger version
      My System SpecsSystem Spec

  7. #7


    Posts : 4
    Nothing


    Quote Originally Posted by theog View Post
    Boot the Windows 7 x64 DVD in UEFI or Legacy mode.

    Click image for larger version
    When I do that I recieve this message; Reboot and Select proper boot device or insert boot media in selected boot device etc. I have burned 2 different copies of Windows 7 and tried to use a USB stick, both don't work. When I use the CD that is given to me which came with the desktop, it works.

    You say that the OS configuration is my CSM but when I change it the option to disable secure boot dissapears, or does it turn off automaticly?
      My System SpecsSystem Spec

  8. #8


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


    Where do you buy your Full Windows 7x64 DVD & Product Key from?
      My System SpecsSystem Spec

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