I am going crazy because my MacBook boots up but freezes at the login screen and the keyboard and trackpad can't do anything( the cursor dosnt move and the caps lock key light dosnt go on when pressed) I keep shutting off and reatarting and I cannot do anything . I put the install DVD in but it dosnt boot with it.. I've tried everything on the Internet bu t the keyboard and trackpad are frozen so I cannot do anything ANY ADVICE? thanks!!!!!!!!!