It is always advised not to install any third party software if you have not heard of it. As you never know that it could infect your computer.
There are many programs which hamper the registry entries and as a result to it Windows 7 CD-DVD drive goes missing. There might not be a specific reason behind its disappearance but Rizone CD-DVD Repair is a portable application that would help you fix this problem.
Rizone CD-DVD Repair is a free and portable program which checks your computer for the missing files and instantly fixes the problem of missing drives. So, regardless the cause of the problem, this application is capable of fixing all the missing drives problems.
Apart from its basic CD-DVD Repair functions, this program lets you to tweak Autorun settings and lets you protect you against Autorun parasites such as autorun.inf.
This program is compatible on Windows 7 and its portability allows you to keep it in your computer without letting it consume your computer resources.
It works on Windows 2000, Windows XP, Windows Vista, Windows Server 2003/2008, and Windows 7. Download Rizone CD-DVD Repair