Is it not playing dvd's at all?
If it is playing DvD's just ignore the cd-rom issue. It's a windows fluke. If not playing DvD's try reinstalling the driver in control panel > System > Device manager > Dvd/Cd-Rom drives, right click the drive, uninstall, right click the name of the computer on the top of the device list click on scan for hardware changes, let it reinstall the dvd drive when asked...