DVD drive not recognized in windows 8

1. Run Command Prompt as an  Administrator. Type cmd in Windows 8 modern UI and press cltr+shift+enter

2. Type following and say enter

reg.exe add "HKLM\System\CurrentControlSet\Services\atapi\Controller0" /f /v EnumDevice1 /t REG_DWORD /d 0x00000001

3. Reboot the system

DVD drive not recognized in windows 8
http://answers.microsoft.com/en-us/windows/forum/windows_cp-hardware/dvd-drive-not-recognized-in-windows-8/ad546c20-b916-4ad5-9858-52e10610ee14