PC doesn't detect CD/DVD ROM

If your PC does not detect CD/DVD ROM, then follow the steps given below, this solution is 100% sure if the error code for not detecting the CD/DVD ROM is 39.
How to check what the error is, right click on “my computer” and go to properties in the pop up menu. Next go to hardware tab and select device manager. Here you’ll see ! mark in front of your CD/DVD ROM. Right click on your CD/DVD ROM in device list and select properties from the pop up menu.
Here in “Device Status” you can check your error code. If it is error 39 then this tweak will definitely work, and it also does work in many other scenarios, so you can definetly give it a shot.
1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Class/{4d36e965-e325-11ce-bfc1-08002be10318}
4. On the File menu, click Export.
5. In the File name box, type savedkey, and then click Save.
6. Click the REG_MULTI_SZ data type UpperFilters, and then click Delete on the Edit menu. When you are prompted to confirm the deletion, click Yes.
7. Click the REG_MULTI_SZ data type LowerFilters, and then click Delete on the Edit menu. When you are prompted to confirm the deletion, click Yes.
8. Quit Registry Editor, and then restart the computer.

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