OK, heres what you need to do:
When the computer starts up, press Delete. it should take you into the BIOS
Then, using the arrow keys, Move down to "Integrated Peripherals" and press enter.
Then move to "OnChip IDE Device" and press enter.
On the top there should be a option that says "Sata RAID Rom", You want to disable this. You should be able to change this Via the + or - keys. (there are instructions on the bottom if its not the + or - keys.)
then press ESC untill you get to the main screen, DONT EXIT, go to Save and exit, press Y and then restart and try the hard drive.