Hola! Why is my system freezing ONLY when watching stream (flashplayer, mp4 ect.) and not when doing anything els and that would be hours of gaming BF3 and such so it is not a temp. related item-cpu will stay under 55 celsius and the same for gpu 60-65 ish specs:
Q9650(o.c. 3,4) PNY XLR 560Ti 4gb pc2-8000 ram Corsair AX750 W vista 64, Gf 301,42 driver and all the newest patches to everthing
More aboutsystem freeze
Go back to older nVidia drivers, the new versions lock up in Flash a lot.