So i got a problem with lion and the only way i could solve it was completely erasing my hd. The problem is that, after i erased it, i can't use any disk with os x to install it. First I tried with the disk that came with my macbook. I boot with it and the apple logo appears, but it loads forever, and i can't acess any utility. Then i tried other versions that i burned on dvds, but the apple logo appears and then a circle with a slash. I really need to get os x Please help!