DVD driver vanished?

Well this is becoming a common problem now with either with geniuses who experiment with their laptops or with people who accidentally do things in a negative way.
SO what do u do when you cant find your dvd drive in your  "my computer", simply follow this steps

-first step is to click the "window" button + the "r" key
-In the dialog box that pops up, you type "regedit"
-a dialog box called "registry editor" pops up

-check the tab on the left here
-double click on "HKEY_LOCAL_MACHINE"
- then double click on "SYSTEM"
-double click on "CurrentControlSet"
-doubleclick on "control"
-doubleclick on "class"
-doubleclick on "{4d36e965-e325-11ce-bfc1-08002be10318}
-now check the right part of the tab, and delete a key called "upperfilters"
-then restart your pc