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I am trying to install Windows 7 on a Lenovo Legion Y520.

It uses the Intel 100 Series C230 SATA controller.

During the install, Windows 7 produces an error that it is missing the disk drivers. However, when I select "browse" to find device drivers, I see that the existing Windows partition is already mounted. So it seems the included SATA drivers are already working.

I tried this with the "AHCI" BIOS option as well as Intel Premium RST RAID enabled.

I downloaded the Intel RST driver, and the Windows 7 Installer claims to have successfully installed the driver, but still claims that no new drives are available.

Why does Windows 7 Installer tell me that it cannot detect disks when it obviously is detecting the disk and mounting partitions on it?

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  • At which point in the install does it pop up with the error? What's the EXACT error it's showing you? Apr 27, 2017 at 18:16
  • Immediately after choosing "Install Now", where you would normally select a disk or partitioning options. Apr 27, 2017 at 18:17
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    As asked, what's the exact error message it's showing you? :) Apr 27, 2017 at 19:37
  • if you install win7 from a USB thumb drive, use the 1 USB2 port, not the USB3 ports Apr 28, 2017 at 15:44

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