Missing Device driver Dell Inspiron 14z N411Z

I am trying to install Windows 7 x64 on my Dell Inspiron 14z - N411Z. Despite trying different ISO which were written to an 8GB flash drive, the Windows installation comes up with this error message:

"A required CD/DVD drive device driver is missing. If you have a floppy disk, CD, DVD, or USB flash drive, please insert it now.
Note: If the Windows installation media is in the CD/DVD drive, remove it for this step."

Some solutions offered online suggested that one should do one thing or the other on the PC's Windows, but this is not workable because there is no OS on that particular laptop.
Some other solutions offered online suggested that one should choose certain option(s) in the BIOS, but the suggested BIOS option(s) are not in this Dell's BIOS.

Surprisingly, I once had a bootable Win 7 on a USB flash drive which never had this issue (and even came in with a Dell image when one checks the laptop's information from right-click COMPUTER > PROPERTIES at System), but I lost that flash's content.

(1). I would appreciate viable, working solutions.
(2). If possible, please indicate where to get the required driver(s) and where exactly to place such in the Windows Installation folders such that one would not even need to manually browse to it, during installations.
(3). I assume that some of the solutions might be using some 3rd party utilities or drivers. I would also appreciate Dell's recommended solution(s) to this challenge, since, I believe they should have developed such, by now.