This computer is nearly 5 years old and it's worked great up until about 3 months ago. I finally ran scan disk and fixed the errors, but somehow, I've lost my cd-rom drive completely. It's still there, duh, but the computer doesn't recognize it at all. It doesn't show up in my computer and I can't open it through start->run. It won't let me do anything at all with it, as if it has never existed. Any ideas?