So I go to best buy and buy a copy of Medieval 2 Total War and Crysis, I get home and get on my computer to install them both. This is where it starts to get weird...I install Medieval 2 flawlessly, but I put in my Crysis disk and it makes a funny clicking noise, the disk doesn't even sound like it is spinning. I compare it to other disks and it appears to be the exact same. So I put in any other DVD I can find laying around, and it reads them. I go put the Crysis disk in my computer downstairs...and it reads the disk just fine. I go back upstairs and put in the disk and all I get is, "click...click...click..." But the disk does not even sound like it tries to spin. What could be the cause of this?

Really strange problem. I never saw such a problem. You do one thing you get any original DVD and try to run in your system. If your system not able to run it or if you hear the same click sound then problem is with your drive only.