My DVD player stopped working

My DVD player stopped working.
delete registry keys UpperFilters and LowerFilters.

Backup registry. Create a restore point, click on the start menu and select run. Type in regedit and press Enter. On the left hand side, you should see a bunch of folders. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class in the Registry Editor dialog box and select the {4D36E965-E325-11CE-BFC1-08002BE10318} key, which appears as a folder. There will be many similar folders by that name, so make sure you select the exact folder as you see listed above. You should see a bunch of registry keys in the folder which will be listed in the right hand window. The two that are of particular interest to us are the LowerFilters and UpperFilters keys. Select each of them one at a time and then select Edit > Delete and press Yes to confirm. DO NOT delete any other registry keys other than the UpperFilters and LowerFilters entries. Now close out of regedit and restart windows. With any luck, you should now be able to see your CD drives in windows once again.