Fix CD rom drive error code 39, 19, 40

Is your cd drive is not working properly?
Can you see a yellow ! on your device manager?

Here is how to fix it.

Windows XP / VISTA / Windows 7

1. Click Start
2. Click Accessories, and then click Run.
3. Type regedit, and then click OK.
   If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
4. In the navigation pane, locate and then click the following registry subkey:
   1. Click HKEY_LOCAL_MACHINE
   2. CLick \SYSTEM\
   3. Click CurrentControlSet
   4. CLick\Control\
   5. Click Class\
   6. Then click{4D36E965-E325-11CE-BFC1-08002BE10318}
5. 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.
6. On the Edit menu, click Delete.
   
7. When you are prompted to confirm the deletion, click Yes.
8. In the right pane, click LowerFilters.
   
9. On the Edit menu, click Delete.
10. When you are prompted to confirm the deletion, click Yes.
11. Exit Registry Editor.
12. Restart the computer.

Alternate options for those who don't want to delete the registry
On Step
5. Just double click the UpperFilter
6. Delete the text inside then press OK
8. Double Click LowerFilter
9 Delete the text inside then press OK
then do the 10-12th step.


Then Viola! Your cd drive is now working properly.
Hope This helps you ^^