Deactivation of UEFI possible? Fallback/Switch to BIOS ?

Discussion in 'Windows 7 Hardware' started by pstein, Apr 16, 2013.

  1. pstein

    pstein Honorable Member

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    Currently more and more motherboards are released which support UEFI.

    Assume I don't want to use UEFI (e.g. because of compatibility reasons): Can I
    deactivate the UEFI features of the motherboard and switch back to "normal" BIOS?

    Peter
     
  2. Saltgrass

    Saltgrass Excellent Member
    Microsoft Community Contributor

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    Most systems will allow you to install whichever configuration you boot to on the Install Media. The Windows 7 DVD and most flash drives have 2 boot images, one for UEFI and one for MBR. If you see the MBR option in your boot device menu, you should be able to boot to it and install in that mode.

    If you can't see the MBR Install version, you may have to change a setting in the bios to allow your system to see the non-uefi options.

    When you try it, let us know exactly what happens.. maybe we can recognize the symptoms if the install doesn't go smoothly.

    And 32 bit Windows cannot do UEFI...
     
  3. Joe S

    Joe S Excellent Member

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    Please post back UEFI is fairly new and most of us have not dealt with it yet.
    Joe
     
  4. Digerati

    Digerati Fantastic Member
    Microsoft MVP

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    You can disable some UEFI features but you cannot switch back to normal BIOS because UEFI replaces the BIOS.

    Well, 32-bit Windows will run on UEFI based platforms - it just cannot support UEFI's advanced features. Note that most UEFI implementations support CSM (compatibility support mode) which emulates regular BIOS. As noted in this Microsoft white paper "UEFI and Windows",
    Still, the advantages of UEFI over BIOS are significant. And the advantages of 64-bit over 32-bit are too. So the best solution for the vast majority is to use 64-bit Windows on a UEFI platform - if possible.
     

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