If you are seeing this error, don't panic. You aren't missing a physical disc, and your computer isn't broken. You are just missing a virtual middleman.
mount d c:\games\mygamecd -t cdrom If you are mounting an actual ISO file (not a folder): mscdex driver not installed dosbox
Don't just mount the folder. Mount it as a CD-ROM ( -t cdrom ). It takes three extra keystrokes and saves you an hour of googling. If you are seeing this error, don't panic