What if the win7 computer's optical drive cannot be used

1. First, let's press the win+R shortcut on the win7 Ultimate computer keyboard to open the running window of the computer. In the open running window, we type regedit and click Enter, so we can open win7. The Registry Editor window for the Ultimate PC.

2. In the open Registry Editor window, click on the HKEY_LOCAL_MACHINESYSTEM CurrentControlSetControlClass{4D36E965-E325-11C E-BFC1-08002BE10318} in the left menu. The Upperfilter item and the Loweverfilter item in the right window are deleted, then the CD-ROM drive is uninstalled and re-scanned in the Device Manager, and then our win7 Ultimate computer will be automatically restored.