OK, when you computer first boots up, it says to into BIOS or Setup press F2 or F8. After you press that a very simple screen will pop up. This is called the BIOS. Change your boot order (by reading the onscreen instructions, a second time if need be as it can be confusing), to say CD first, then hard drive. Make certain you save it. Make certain your disk is in and reboot. Now, when it is all completed, you are going to have to go back to make the change to boot from harddrive, or everytime the machine boots up, it will look at cd and if there is one present it will launch from it!