Unibody Macbook Pro June 2009 edition 13.3'' OSX snow leopard 10.6.2 2.26Ghx intel core 2 duo 4GB DDR3 Basically, every couple hours or so, my whole computer just stops responding. First symptoms are: my internet stops working(still responding) then, as i try to force quit, program dose not respond, nor does it close. All programs not responding. I even try to reboot finder, no luck. I try to restart or shut down computer, dosent work. This is all accompanied by the SBBOD. only way to fix this is to manually restart, holding the power button... ive had this problem for about a month now, and have run Virus barrier X5 several times, no viruses. help?