CD DVD drive not working

1.Click on Start.
2.In Start Search or Run type devmgmt.msc and then hit enter.
3.This would open the Device Manager Window.
4.Now locate something which reads as Cd/DVD , there would be a + sign next to it,
5.Click on the +Sign next to it and down below locate the driver responsible for the funtioning of the cd & dvd.
6.Now right click on the driver and then click on Uninstall.
7.Now locate an option right at the top which reads as ACTIONS.
8.Click on Actions and then click on Scan for Hardware Changes.
9.Close the Device Maneger Window.
10.Click on Start and in Start Search type Regedit and then click Enter.
11.This would open the Registry Editor Window.
12.Locate an option which reads as HKEY_LOCAL_MACHINE
13.Click on the +Sign next to it.
14.Now locate another option which reads as SYSTEM.
15.Click on the +Sign next to SYSTEM.
16.Now Locate another option which reads as Current Control Set.
17.Click on the +Sign next to it.
18.Now locate another option which reads as CONTROL.
19.Click on the +Sign next to it.
20.Locate an option reading as CLASS.
21.Click on the +Sign next to it.
22.Now we would find a lot of keys..
23.Locate a key which reads as 4D36E965
24.Click on the Key and then look right at the right top corner of the screen and locate Upper Filters and Lower Filters.
25.Right click on Upper Filter and then click on Delete.
26.Do the same if you get Lower Filters as well.
27.CLose the registry and restart the computer to check rthe funtionality of the Drive.
I am sharing a screenshot of how filters look in registry..
http://filedb.experts-exchange.com/incoming/2008/06_w26/35425/Regedit-DVD.JPG
Hope this works.
Regards
Ken