DVD drive not recognized in Windows 8

1. Open a Command Prompt as Administrator (Cltr+Shift+Enter)

2. Type:

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

Press Enter

3. Reboot

Source: answers.microsoft.com