It may be a hardware issue with the cd/dvd drive, but please try the following and see:

Please click on Start, then right-click on Computer, then click on Manage, then click on Device Manager, then open DVD/CD drives, and right-click on the item(s) under it and click on Uninstall and confirm, then restart the computer and check.

If that does not work, please click http://support.microsoft.com/kb/982116, then click on Run now, to download and save, then run the automatic cd/dvd fix.

If that still does not work,

1. Click Start, and type regedit and then press Enter.
2. Expand to the following path:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
3. In the right pane, click UpperFilters if available.
   
4. On the Edit menu, click Delete.
5. When you are prompted to confirm the deletion, click Yes.
6. In the right pane, click LowerFilters if available.
   
7. On the Edit menu, click Delete.
8. When you are prompted to confirm the deletion, click Yes.
9. Restart the computer and check.