@aninvitedsoul thank you for the information can you please tell me step by step solution of this issue.
The problem is when I try to install windows 7, I get the error "A required CD/DVD drive device driver is missing. Please insert the installation media etc...
If you get this error when trying to use a flash drive as your boot media, make sure you are plugged into a USB 2.0 port NOT a USB 3.0 port.