Windows 7 installation on Samsung NP900X4C-A02SE, cannot find disc

We bought Samsung NP900X4C-A02SE, it came with preinstalled Windows 8. We are trying to install Windows 7 on it, but W7 installation cannot find the SSD drive on the laptop. We needed to disable UEFI and Secureboot to get W7 installation started, but not that it starts, it can't find the disc. And I cannot find any drivers to this laptop for storage that can be given on installation. Tried to disable AHCI also, same results. How to get W7 for this model?
matarvaiAsked:
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matarvaiConnect With a Mentor Author Commented:
Created new installation w7 media with Renesas Electronics USB 3.0 Host Controller Driver and installation worked without an issue.
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rindiCommented:
Try the Intel Rapid Storage driver, and if that doesn't work, the chipset drivers from the Samsung Website. It seems they are setup.exe files, so you will first have to run that exe so the contents extract, and then put those folders on a USB stick.

If you are installing a 64 bit version of Windows 7 you should only need to disable secureboot for the installation, UEFI should be fine.
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David Johnson, CD, MVPOwnerCommented:
It is the AHCI that is causing the problem.. you will have to get the driver off of the Samsung Website, I tried myself but had no luck.. perhaps one of the support pages that they will email you have further options.
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matarvaiAuthor Commented:
Downloaded Intel Rapid Storage Driver from their site f6flpy-x64.zip, extracted, put on the usb stick, windows installation finds hardware matching to that driver, but still cannot find the disc after this
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rindiCommented:
And the chipset driver? Unpacking it it includes AHCI things...

Also, enable UEFI for Windows 7 if it's the 64bit version. It should work and you would also be able to use your disk in GPT, not MBR mode then.
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George-Commented:
Have you checked with Samsung that it is Windows 7 compatible?
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matarvaiAuthor Commented:
It is Windows 7 compatible.
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matarvaiAuthor Commented:
Haven't heard anything back from Samsung still after I emailed their support yesterday
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rindiCommented:
Have you tried the chipset driver like I suggested several times already?
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matarvaiAuthor Commented:
Tried chipset driver also, will find compatible driver on installation, but not drive after that
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