I get PC Gamer magazine and every issue comes with a demo CD. I havent been able to get a single one of the CDs to come up on my computer. When I insert them, the sound comes on from the background of the CD and a box pops up for it in the task bar, it is also in the task manager, but nothing comes up on the screen. The only way I have of accessing the CDs are by going to my computer and explore the drive I put the disc in. Any thoughts?