I have a HP 640 DVD RW when i put DVD-R blank disk in it reads it as a cd. I have another DVD RW in the same computer and it does the same thing. How do I get these to read the disk right so I can burn. Day before yesterday they were fine. I have no idea what has changed.
Go to hardware manager and uninstall the secondary IDE controller then reboot your pc. see if that has fixed it.