macbook pro keeps shutting down
my macbook pro keeps shutting down for no reason. i have just installed the latest software for itunes but since doing that, it has shut itself down automatically 4 times in the last 30 minutes. All my software is no up to date or so it says but it didn't ask me to restart my machine once the install had finished, i carried on working and then it just shut itself down.
I am running on MAC OS X 10.6.8, Processor 2.3 GHz Intel core i5 and memory 4GB 1333 MHz DDR3.
Can anyone help please?
MacBook Pro, Mac OS X (10.6.8)