⟩ What do I do if I insert a CD or DVD and Windows 7 doesn’t recognize it?
First, try uninstalling and reinstalling drivers using the Device Manager by following these steps:
Step 1: Click the Start button, and then click Control Panel.
Step 2: Click Hardware and Sound, and go to the Devices and Printers, select Device Manager.
Step 3: In Device Manager, expand DVD/CD-ROM drives, right-click the CD and DVD devices, and then click Uninstall.
Step 4: When you are prompted to confirm that you want to remove the device and click OK.
Step 5: Restart your computer.