Remember that Windows® 7 works as legacy, so, it will only detect the SSD on legacy bootable devices.
There are 2 different ways to install Windows ® 7, once is the normal installation, and the other one is with UEFI mode, to be able to see the SSD on UEFI bootable devices, you need to install Windows ® on UEFI mode, and the SSD should appear there.
This also could be related to the ISO image created with SCCM 2012, maybe that ISO does not work properly to do that.
Also remember to enable UEFI on the BIOS.
At the moment when you are installing Windows® you should be able to see UEFI Windows®; that is the one it should work.
If after that you still do not see the SSD on UEFI bootable devices could be because:
UEFI is not enabled
The copy of Windows is not genuine or it is 32-bit
The media used is not supported in regards to USB bootable drives
Unfortunately no UEFI device will boot. Even devices that I have used previously (ie: Acronis) will no longer boot. It shows up in the F10 boot menu, but it just loops straight back to the boot menu when I select it.
Windows 7 and other legacy devices boot fine - they just do not show up in the F10 boot menu. I simply have to let the machine pick a boot device based on the priorities set in BIOS.
UEFI is definitely enabled. It detects a bootable device, but will just loop back to the F10 menu.
Is 'Secure Boot' enabled or disabled?
Correct, just to make sure about this situation, I just tried to duplicate the issue in our lab and actually the SSD using Windows® 7 will not appear on UFI bootable devices.
Let me apologize for any misinformation that I gave you before.
The UEFI version on Windows® 7 actually what it does is to allow you to use an SSD or hard drive with a size higher than 2TB.
Regardless if the secure boot is enable or not, when using Windows® 7 the SSD or hard drive will only appear on Legacy Bootable devices and you will be able to install Windows® 7 on the SSD as legacy.
Yup, checked secure boot and it's disabled. I even enabled and wiped the secure boot as I'm grasping at straws and absolutely no difference.
It just will not boot UEFI devices.
Correct, Windows® 7 will not recognize UEFI devices because it is Legacy, so, if you need to use UEFI devices, then the best thing to do will be to use Windows ® 8 or 10.
Thanks Alberto - I don't think you understand. The UEFI boot is not working. Period. It doesn't matter what OS I use, it will not boot into a detected bootable UEFI (like Acronis or Windows 10).
Take Windows 7 out of the equation and the problem still exists!
Thank you very much for that information; let me apologize if I misunderstood the information you gave me before.
The reason why the SSD is not showing on UEFI bootable devices, could be related to the way the SSD was formatted, in that case, you can always try to format it again during Windows® installation.
Requirements for installing Windows in UEFI mode:
UEFI must be enabled in the motherboard BIOS
A DVD/CD-ROM drive (bootable USB flash drives with the OS may work, but as official practice always use the original Windows media)
A genuine copy of Windows supporting UEFI in 64-bit (Windows Vista® with Service Pack 1 (SP1), Windows® 7, Windows® 8, Windows 8.1, Windows Server® 2008, Windows Server® 2008 R2, Windows Server® 2012, and Windows Server 2012 R2, Windows® 10).
Steps to install it:
Enter the board BIOS and enabled “UEFI Boot” and make sure “Legacy boot” is also enabled.
Save changes and exit bios
Booting up the board into the default “Boot manager” by pressing the “F10” key several times when the NUC is starting up to get that menu (OEM and 3rd party brand boards may use a different key)
From the drives listed pick the one with the DVD/CD-ROM description that starts with UEFI.
Follow the Windows set up and then select the HDD you want to use for the installation.
If you tried all that, and still the SSD is not showing under UEFI boot device or if you are not able to install Windows® in UEFI mode, then there might be a problem with the NUC itself, and it needs to be replaced, especially if it worked fine before.
To do that, please get in contact directly with us through chat, email, online support or phone support, here is the link to do that, you just need to select the type of product you are interested in replacing and you will get those options:
Looks like I'll have to contact support on this one. Very strange indeed!