Is it somehow possible to install Windows 7 on UEFI (non CSM) laptop ?

Discussion in 'Windows 7' started by acid1996, Jan 15, 2016.

  1. sebus

    sebus MDL Guru

    Jul 23, 2008
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    Win 7 does NOT work on pure UEFI (with no CMS support enabled or all together missing)
     
  2. Oz

    Oz MDL Expert

    Sep 1, 2009
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    So would this also enable to install from a USB 3.0 port for Windows 7?

    Or do I have to integrate drivers in install win as well?
     
  3. Mr.X

    Mr.X MDL Guru

    Jul 14, 2013
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    Yes, Win7 only supports UEFI halfway so to speak. It needs CMS enabled and SecureBoot disabled.
     
  4. ashish.k

    ashish.k MDL Senior Member

    Dec 27, 2014
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    Yes, it would enable support for installing Win7 via USB 3.0 port but you will have to install drivers after Windows installation as Win7 does not support USB 3.0 natively.
     
  5. sebus

    sebus MDL Guru

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    Well, it can boot from USB 3 if firmware of the machine supports, Win 7 will load, but that is not much help, as without correct drivers integrated one will have NO mouse/keyboard, hence one can not continue installation (just tested it yesterday)

    sebus
     
  6. ashish.k

    ashish.k MDL Senior Member

    Dec 27, 2014
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    @sebus,

    Now this is the case if you have Win7 setup files (does not support USB3.0) and Win7 install.wim but not if Win8/8.1/10 setup files (supports USB3.0) and install.wim of Win7. Try it!
     
  7. Flipp3r

    Flipp3r MDL Expert

    Feb 11, 2009
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    Your better off integrating the USB3 drivers into both indexes of boot.wim, install.wim & winre.wim. Also handy to integrate raid drivers and nic.
    Windows 8 does not have native usb3 support for all chipsets, only some. Windows 7 has no support & requires drivers...
     
  8. sebus

    sebus MDL Guru

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    I do not care about setup, I do dism /apply-wim updated_install.wim to local HD from booted WinPE 5 (so in WinPE USB3 works fine, once Win 7 boots, USB3 does NOT work unless correct drivers do get integrated/installed)
     
  9. mackrack5

    mackrack5 MDL Novice

    Aug 27, 2010
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    Many time I stuck at User name creation with Apple Mac Book Air When it released latest Air with changed USB and also touch pad hardware,which force me to install W8.
    I have integrated Gimagex in winPE which is working fine to deploy wim images.
     
  10. jiggunjer

    jiggunjer MDL Novice

    Jan 22, 2016
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    So if I understood correctly, win 7 ISO lacks a efi folder that has the important booting stuff for non-legacy UEFI?
     
  11. Mr.X

    Mr.X MDL Guru

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    #31 Mr.X, Jan 24, 2016
    Last edited: Jan 24, 2016
    No. Win 7 x64 iso actually has an efi folder with the required files, although I don't now whether those files are the only ones that manage all UEFI support. Bottom line is Windows 7 x64 needs CMS (Legacy mode) enabled and SecureBoot disabled. Windows 7 x86 does not support EFI boot at all.
     
  12. DummyPLUG

    DummyPLUG MDL Novice

    May 31, 2008
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    The reason that Win7 cannot install on pure UEFI is because its vga.sys didn't support UEFI GOP, and that vga.sys will be use when in safe mode and install.
     
  13. acid1996

    acid1996 MDL Novice

    Jul 29, 2015
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    Well yeah it's surely that, I remember now that when I switched to Legacy Support, in BIOS Information screen Intel GOP Driver X.X.XXXX was replaced with Nvidia's VBIOS one. Too bad that Windows 7 doesn't work in pure UEFI, it would be good combo if you don't want to migrate from GPT to MBR.