Hi,
Thank you for choosing Windows 8 and welcome to Microsoft Community Forums.
I see that after installing Windows 8, the DVD/CD-ROM drive will not read DVDs.
I understand the issue and will point you in the right direction to resolve it.
However, please answer this question:
1. Does the issue occur only in a particular DVD?
I would like to inform you that Windows 8 doesn’t support DVD playback.
Windows 8 and Windows 8 Pro don't come with DVD movie playback capability. If you're running Windows 8 or Windows 8 Pro you can search for a DVD player app in the Windows Store.
If you have Windows 8 Pro, you can buy the Windows Media Center Pack that includes DVD playback.
http://windows.microsoft.com/en-US/windows/dvd-playback-help
You will need to install third-party software to play DVDs in Windows 8.
Hope this helps.
Please post any other questions you have regarding Windows operating systems on this Forum. We are happy to assist you.