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Cannot install Win7 on UEFI system

I just built a new HTPC (build in a separate thread). I have it all together, go to install windows and it cannot locate any hard drives. I have a 2Tb SATA III drive attached, in which the BIOS sees with no problems. I have tried setting the drive in IDE mode, AHCI mode and RAID mode. I've tried loading the drivers from the disk for both RAID and AHCI and windows setup just tells me no drives can be found. This is my first experience with a UEFI system, so any help would be greatly appreciated.
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  1. In your boot menu, is there an option to boot in "legacy" BIOS mode? You may see one entry for the install disk marked "UEFI" and another "AHCI."
  2. Best answer
    What motherboard are you using? I want to know the bios you are using with the options in it.

    Are you telling me your bios isnt detecting your hard drive as an Bootable Device? , is it a new a drive?

    Its the Bios of the Motherboard detecting the HDrive but the windows install its not detecting it?

    You should put it on AHCI mode, and boot order on cd/dvd/bray, and last pro tip check the format of the HDD, you want NTFS or FAT32.
  3. SchizTech said:
    In your boot menu, is there an option to boot in "legacy" BIOS mode? You may see one entry for the install disk marked "UEFI" and another "AHCI."


    I am booting from a USB drive for windows install. I can select either USB: <drive> or UEFI: <drive>. There is no legacy mode.
  4. OK, so in your case "USB: <drive>" corresponds to the "legacy" mode. Have you tried both options in the boot menu?
  5. chulex67 said:
    What motherboard are you using? I want to know the bios you are using with the options in it.

    Are you telling me your bios isnt detecting your hard drive as an Bootable Device? , is it a new a drive?

    Its the Bios of the Motherboard detecting the HDrive but the windows install its not detecting it?

    You should put it on AHCI mode, and boot order on cd/dvd/bray, and last pro tip check the format of the HDD, you want NTFS or FAT32.


    It's an ASRock FM2A85X-ITX board. It's a brand new drive, never has been formatted. The BIOS (UEFI setup utility) does see the drive in the list of SATA devices. When I run windows 7 setup, it tells me no drivers could be found. I try to load the drivers from the ASRock disc, which it loads, but still says no additional drives can be found.
  6. Do I need to put the drive into another computer and format it first?
  7. Case012 said:
    Do I need to put the drive into another computer and format it first?


    Windows should detect the drive and format it during the install process. The drive does not need to be formatted for Windows setup to "see" it.

    Have you tried booting the flash drive in both the "USB" and "UEFI" modes in the boot menu?
  8. SchizTech said:
    Case012 said:
    Do I need to put the drive into another computer and format it first?


    Windows should detect the drive and format it during the install process. The drive does not need to be formatted for Windows setup to "see" it.

    Have you tried booting the flash drive in both the "USB" and "UEFI" modes in the boot menu?


    I have, didn't change anything. I just created a copy to DVD to try and boot from that instead of USB. We'll see if that changes anything.
  9. Case012 said:
    SchizTech said:
    Case012 said:
    Do I need to put the drive into another computer and format it first?


    Windows should detect the drive and format it during the install process. The drive does not need to be formatted for Windows setup to "see" it.

    Have you tried booting the flash drive in both the "USB" and "UEFI" modes in the boot menu?


    I have, didn't change anything. I just created a copy to DVD to try and boot from that instead of USB. We'll see if that changes anything.



    Yeah, connect it to another pc and format it to a NTFS or FAT32 and try it again. Trust me i have been doing this for a long time, I bet your HDD its an Western Digital too.
  10. I just wanted to comment that I had a similar problem for the last few days and here is what I had to do to solve it:

    1. I own a DVD copy of Windows 7 Ultimate - create an ISO of the DVD
    2. Use microsofts USB utility to create the USB installer
    3. Use INTELs utility to load the USB 3.0 drivers into the images on the USB installer
    https://downloadcenter.intel.com/download/25476/Windows-7-USB-3-0-Creator-Utility
    Note: this took a while, probably at least 20+ minutes to complete, but it did work.
    4. on the target PC connect the USB installer to any USB 3.0 port and install.


    The problem that I was having was my new MoBo had only 2 legacy USB 2.0 ports, but I had my USB keyboard and mouse connected to USB 3.0 ports. Windows was having trouble detecting them because it could tell they were on ports it didn't have drivers for. I realised this because during the "failing" installs (which we failing with the "driver required" messages) my mouse was moving very lethargically "generically" you might say. However, after installing the USB 3.0 drivers, and user the "fixed" USB installer my mouse was responding rapidly as I would have expected.

    I believe that as a workaround users should TRY and unplug everything from any USB port except a legacy USB 2.0 port. In my case I would have had to remove my keyboard while insalling windows and just use the mouse, and hopefully hot-swap them back and forth. I am not even sure that would work, so good luck if you try that. Otherwise, I suggest you use the linked intel utility to load the USB 3.0 drivers onto you existing Windows 7 USB Installer.


    Hardware:
    Gigabyte GA-Z170X-Gaming 3 ATX LGA1151 Motherboard

    USB Keyboard
    USB Mouse
    USB Thumbdrive loaded with Microsoft Windows 7 Ultimate 64bit
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