Hi. First Try CD then DVD. If one wil read and the other not, then you need to replace the drive. DVD an CD are on two different wave links so it is possible that it would read one and not the other.
One thing to check, if you are comfortable working in the registry:
1.Click Start
2.Type regedit, and then click OK.
User Access Control permissionIf you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
3.In the navigation pane, locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
4.In the right pane, click UpperFilters.
Note You may also see an UpperFilters.bak registry entry. You do not have to remove that entry. Click UpperFilters only. If you do not see the UpperFilters registry entry, you still might have to remove the LowerFilters registry entry. To do this, go to step 8.
5.On the Edit menu, click Delete.
6.When you are prompted to confirm the deletion, click Yes.
7.In the right pane, click LowerFilters.
Note If you do not see the LowerFilters registry entry, unfortunately this cannot help you any further.
8.On the Edit menu, click Delete.
9..When you are prompted to confirm the deletion, click Yes.
10.Exit Registry Editor.
11.Restart the computer