I am trying to install Windows 7 on my laptop from a USB drive. I used the Microsoft tool to make a bootable Windows 7 USB drive and it boots, but when I try to install it says:
A required CD/DVD drive device driver is missing.
How do I get around this?
Answer
You properly plugged the USB thumb drive into an USB 3.0 port (blue). Windows 7 doesn't have an USB 3.0 driver build in.
So you must add the USB 3.0 driver first to your boot.wim (mount the WIM, use DISM /Add-Driver to add the driver, commit and unmount the WIM) or connect the USB drive to an USB 2.0 port.
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