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I'm trying to install Windows 7 Professional SP1 64 bits on a NVMe SSD from a USB drive. I know Windows 7 does not have NVMe support, so I need to install the drivers during the installation. The problem is that during the installation I cannot see my USB drive were I copied the drivers. Here is what I did:
- I used the Rufus tool to create a bootable USB in GPT partition UEFI mode FAT32 format.
- I added the drivers to the USB and to a second USB.
- I inserted the USB in the computer's USB 2.0 port and entered the BIOS.
- on the BIOS I enabled CSM support and selected UEFI mode for Storage and PCIe.
- Then I booted into the installer and it asked me for a driver which I was expecting.
- I clicked on Browse and I could only see the X: drive which has the installation, but I couldn't see my USB drive.
- I inserted my second USB, but that didn't work either. I read comments of people inserting it on the USB 3.0 slot and that why it didn't recognize it, but that isn't the case here, I'm using USB 2.0.
Specs:
- Mobo: ASUS Z170-A
- CPU: Core i7 6700k
- RAM: 2 ✕ 8GB DDR4 2666Hz Hyper X Fury
- SSD: Samsung 950 Pro NVMe M.2.
I might be missing something in the BIOS, but I don't know what.
You shouldn't relate EHCI with USB 2.0 and xHCI with USB 3.0 that way. xHCI is designed to manage ports of all speed types. Even with pre-100 chipsets, xHCI controller will manage USB 2.0 ports as long as the OS has driver for it. – Tom Yan – 2016-06-28T00:08:22.417
@TomYan I know, you raise a good point. Most folks have no idea what EHCI and XHCI is, so I wanted to highlight the key difference between the two in a way most folks will understand. – misha256 – 2016-06-28T00:26:03.927
Ahh you are right. I don't have optical drive but i edited the iso file to add usb 3.0 drivers and that worked like a charm. One question though. If it doesn't have usb 2.0 drivers either, why did the keyboard and mouse worked? – superjugy – 2016-06-28T22:53:19.173
@superjugy I think this is how keyboard/mouse work: http://superuser.com/questions/303365/what-does-legacy-usb-mouse-support-in-a-bios-mean
– misha256 – 2016-06-29T00:23:22.800