Hi
There should be no connection between problems with Floppy disk drive & DVD drive
Win 7 does not show removable drives until disk inserted.
Registry corruption can prevent CD or DVD being read (Google 'upper filter drivers site:microsoft.com' for fix)
Security Software can prevent access to CD/DVD
or hardware problems may occur. Does Bios and Device Manager show a CD\DVD drive ?
CD & DVD have separate laser which can fail. power & data cables can come loose at either end
Can you boot up from a Windows CD/DVD or any other bootable CD ?
if so it looks like software or registry corruption.
regards
Mike Barnes