so last night i installed mavericks on my e6410 / intel graphics machine. all was smooth sailing until it booted for the first time. i got it registered key board layout all that. got to the home screen and then it went black. i tried to reboot and i get a frozen dial under apple logo. when i try to boot into verbose or safe mode or use any flags for that matter it refuses them. instead of a "-" showing up it gets inputed as "/". so if i input "-v" it says " can't find /v". help?