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Cannot install Win7 on UEFI system

Last response: in Systems
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July 27, 2013 4:40:45 PM

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.
July 27, 2013 4:45:41 PM

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."
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July 27, 2013 4:52:34 PM

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.
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July 27, 2013 4:54:20 PM

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.
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July 27, 2013 4:56:25 PM

OK, so in your case "USB: <drive>" corresponds to the "legacy" mode. Have you tried both options in the boot menu?
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July 27, 2013 4:57:09 PM

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.
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July 27, 2013 5:10:35 PM

Do I need to put the drive into another computer and format it first?
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July 27, 2013 5:13:55 PM

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?
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July 27, 2013 5:20:24 PM

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.
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July 27, 2013 5:41:25 PM

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.
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