Win7 Installation via USB failing on UEFI and Legacy


  1. fluffymitten
    Posts : 3
    Windows 7 Pro x64
       New #1

    Win7 Installation via USB failing on UEFI and Legacy


    I have read the tutorials and the many posts on this topic so apologise for creating another post on an old topic. I am hoping I am being an idiot and have just missed something really simple.

    Scenario 1: Created UEFI bootable USB, using Rufus, configured BIOS with CMS disabled and Secure Boot enabled. USB drive is recognised in BIOS as UEFI and selectable as a boot option. Windows files show as loading and then it sits with the Windows logo doing nothing.

    Scenario 2: Created 'normal' bootable USB, using the Windows Download Tool, configured BIOS with CMS enabled and Secure Boot disabled. USB drive is recognised in BIOS but not as a boot option. Get a message prompting to insert boot media.

    I don't have a DVD drive so USB is my only boot option. The system is a 3XS Scan custom build but the OS stopped recognising mouse and keyboard even in safe mode so I opted to wipe the hard drive and start with a fresh build. The OS was being unstable anyway and it was time for a clean install.

    This is the first time I've tried a build since UEFI has started rolling out and it's nowhere near as straight forward as it used to be... Just used to pop a USB or (remember these...) a floppy to a basic command line to set up the partitions and load up the OS. So, what I am really saying is that I am utterly clueless in this new world order and will need handholding...

    Thank you for any help and suggestions.
    Last edited by fluffymitten; 08 Aug 2015 at 14:03. Reason: typo
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  3. genet
    Posts : 32
    Windows 8.1/10 x64
       New #2

    Asus motherboard with UEFI firmware. How to install Windows 7/8/10 64-bit in UEFI Boot Mode. -> link
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  4. Layback Bear
    Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       New #3

    @ genet
    May I suggest posting this. One knows where this is going to send them.

    UEFI settings for ASUS z77 prior to Clean install

    Instead of this -> link

    One is never sure where -> link is going to send them.
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  6. fluffymitten
    Posts : 3
    Windows 7 Pro x64
    Thread Starter
       New #4

    Thanks for the suggestions but still gets stuck on the Windows Logo. I either have three faulty USB drives (but I can boot from all on non-UEFI mobos) or something is up somewhere.

    A friend kindly removed their SATA DVD drive to lend me and I was able to successfully boot from DVD and install Windows.

    I guess I will have to try and resolve this issue another day, probably when I next urgently need to rebuild my PC.

    Is there any reason why it's so hard to use USB with UEFI, or am I just unlucky?
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  7. ThrashZone
    Posts : 20,583
    Win-7-Pro64bit 7-H-Prem-64bit
       New #5

    Hi,
    Yea I haven't tried yet on a asus x99 board the bios settings are so complicated
    But setting boot/ secure boot and to Other OS is 1 option to try ?

    Then you get into CSM compatibility support module stuff is where the fun starts
    The default is uefi and legacy oprom so in theory it should work no telling what oprom is

    I'd guess switching Launch CSM will disable secure boot but I'm too chicken to try it yet :)
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