On July 30th I upgraded by computer to the Windows 10 operating system. Since then, however, my CD/DVD drive is not detected and/or recognized. The icon on my desktop has a big question mark on it. If I click that, I get the following error message: The item 'E:\' that this shortcut refers to has been chnaged or moved, so this shortcut will no longer work properly. I have looked under Device Manager for the CD/DVD drive, and there's nothing there. What happened, and how do I fix it?