Hi I am running a (until yesterday) stable PC with Vista.
Since yesterday, I've had four instances of this problem:
The system, without warning, completely stops responding - no reaction to mouse or keyboard (including Ctrl-Alt-Del). Screen just freezes. Only reset button works.
As far as i can tell, I'm not doing anything unusual, it's not the same software running each time (firefox, outlook, VS 2008, etc).
Any ideas where I should start looking to diagnose this? Could it be RAM? Software / OS? CPU even?