I have recently tried to install windows 7 through bootcamp assistant. I tried to set up the bootcamp assistant and went till partitioning the disk. Later I gave up the idea and deleted the partition. But when I restart the machine, it is going to a black screen and saying "No bootable cd exists. Insert bootable cd and press any key." Now I have to press "option" everytime my sweet mac is booting up. When I press opt button, it is showing two hard disk symbols, one is macintosh hd and the other one is recovery. Do I have to always press opt key from now on to get into os x? Is there any way to go back to the time when I just need to hit my power button and it directly takes me to my login screen? Please help me.