stuck with the mac osx loading screen with forbidden icon

[steventt]

Hi,
I have mountain lion on hp pro 4530s i7, the osx was working fine with 4530s.
then i tried to update the iphoto through the apps store.
after i downloaded it completely, they ask me to restart,
then i stuck on the screen that have a apple logo with a loading sign and a forbidden screen forevrer.

i tried to restart again , boot with GraphicsEnabler=No, but still can't get to anywhere.

i tried with the terminal
cd /Volumes/<HD NAME>

• rm System/Library/CoreServices/PlatformSupport.plist
  then restart, but still not work

Appreciate all the helps!!
Thankyou.

 

[steventt]

i tried hold "option + command + p + r " after power up your machine, but this only allow me to get into safe mode, after restart, i still stuck on there.