Why do I get a Blue Screen?

Hi,
I'm using Vista, NOD32 v3, Vista Firewall, and Opera.
My surfing habit is safe IMO.
However, I just got a blue screen error.
I don't have any idea why I got it,
and it is my first time.
Is there anyway I can find out whats the matter?
It happened too suddenly, so I couldn't read the message.
Is there a possibility that I got a malware or a hacker intrusion?
It doesn't look like a crash between softwared,
because I never had any problem till now.
HELP!!!

P.S. All the "IMPORTANT" windows updates are installed.
And the scan with NOD32 shows that there is no malware.

 

Start by doing this - http://vistasupport.mvps.org/disable_automatic_restart_to_read_blue_screen_messages.htm
Then review quick option's - http://www.bleepingcomputer.com/tutorials/tutorial148.html

*So, you're blue screen reference any recent program update's?


GF