what seems to be the problem

I just reformatted my computer,and installed all me software ,but, when I went to install my software a prompt would come up with the cd in the drive and it would say no cd in the drive make sure to put a cd in the floppy drive. when I would put a empty floppy with the cd I was downloading it would download the program on to the drive without a problem ,The question is this why is their a prompt asking me to put a floppy in with the cd I’am running,I have set the bios properly,can I fix this oram I going to have to reformat everything again.