Q: Macboop pro late 2011 keeps beeping beep-beep-beep beep-beep-beep when watching video after UPDATE !!!

hello,

Iwas watching a video and i restart it and then my macbook beeps very hard. It was 3 beeps-3beeps-3beeps...

It was continously beeping 3 times and i can't do anything. i hold my power button and shut it down and when i strat the mbp again it kept beeping. Then i power off and tried again and now it works perfect. For what is the beeping? Is it a RAM problem or logic board?

I bought the mac 11 january 2012 in the apple store. MACBOOK PRO 15" 2,2 GHZ with OS X LION.

Ow and just before the beeps my MAC was restarted from updating.

Pleas can anyone tell me what to do...