I recently bought the Zoo Tycoon: Complete Collection and tried to install it onto my computer. At first, it would register that there was something in the disc drive, but it wouldn't load when I would click on it. It had done the same thing with the Sims 4, and I rebooted (reset) my computer to install it. I tried that again for this game, but now it won't even register that there is a game in the tray, or that I even have a CD/DVD ROM. I've researched other solutions and have tried what they've suggested, but nothing has worked so far. Why is this happening? What can I do?