[Jester]

what are your specs on your computer you might have a hardware issue. Do you have the minimum requirments to run the game? Does the game install on anyother computer? Could also be that ther is something wrong with the optical drive make sure all if its drivers are updated and most of all, cause ive run into this problem befor, make sure the drive is plugged into the psu. Had a customer once that wanted to replace the oprtical drive cause it was telling him that the drive needed to have a cd in it. I opened up the case and sure enough the ide cable was pluged in but the psu cable had josteled loose.