My buddy just got this decent AMD machine for free through his dad.When you try to run a cd, you can hear the CD spinning, but nothing happens. Neither of the CD drives show up in 'my computer' either. Trying to run the drives from Start > Run doesnt work either. Both drives are connected to the motherboard and both have the power plugged in. Anyone know what could cause this? Anything you would reccomend to look at/try? Thanks in advance.