Is it possible to convert a CD/DVD to an ISO file using cmd.exe and if so, how?
I can think of using
dd if=/dev/cdrom of=cdrom_image.iso with Linux systems, but in Windows?
Windows does not have native tools to do this from the command line. As Mehrdad suggests, you could install the windows version of dd to do this, but if you're going to install software, you may be better of with something designed to do this (like ImgBurn), rather than a more general tool like dd.