a required CD/DVD drive device driver is missing

[DiogoCDS]

there's no need for all of this
When Windows is asking for driver, just click Cancel. You will be brought back to the welcome screen. At the welcome screen, remove your USB drive, insert it back to DIFFERENT USB PORT. Click Install Now again. The installation process will be like usual.

This problem happened to all new version of updated Windows 7 installer. I think, it is due to failure of Windows installer to remain its detection to the USB drive. It lost the connection, and became confused, don't know where to find the USB drive it used to read before.

When we re-insert the USB drive, Windows installer will detect the USB drive back, and continue like usual.

good luck guys

This is exactly what I do whenever that happens and it always worked.
I was about to post that, but I guess you did it first.

 

[Lohmann]

Got exactly the same problem and like you've said before, its random. I've tried for the first, second and third times, every single getting it. So i went to reboot and do it all again, but in this time, it worked... problably its some kind of problem in the reading of files by the netbook (i'm using and Toshiba NB505 Netbook) on mobile LG DVD-Rom.