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I have a little issue with my ASUS UX31A. I just tried to do a clean install of Windows 7 64bit using a USB-Stick created using Rufus.
The laptop booted from the USB stick and opened the Windows installation, after a few clicks I got the message "A required CD/DVD drive device driver is missing. If you have a driver floppy disk, CD, DVD, or USB flash drive, please insert it now.".
I have tried literally every suggested trick (putting USB3 drivers on the stick, switching USB ports after error message...) but nothing works.
I have no idea how to proceed and would be happy for any helpful suggestions.
You could revert back to an older bios, like the one you previously had that worked for the USB stick at least otherwise you could call ASUS. – Eric F – 2014-10-14T13:28:49.923