This post will help you to show up DVD/CD ROM in windows 8 if it not detected.Many of the users of Windows 8 Consumer Preview (Beta) are face strange problem that CD/DVD drive not showing or disappearing .If you also facing this problem and can't see your optical drives (CD/DVD Drives/Writers), then this tutorial will help you.
How to fix Optical Drives (DVD/CD) not detected in Windows 8
1. Run Command prompt in Admin mode. For this type cmd in metro UI & press ctrl+shift+enter to get the cmd Window.
2. Now copy following text:
reg.exe add "HKLM\System\CurrentControlSet\Services\atapi\Controller0" /f /v EnumDevice1 /t REG_DWORD /d 0x00000001
3. In the Command Prompt Window just paste the above text and press enter
4. Reboot your system and now you should have access to your CD/DVD Drives.
I hope it helps you.