What graphics cards do you have?and what case? what are the temperatures like?has it always done this or started recently?
NO ADDITIONAL GRAPHICS CARD, I AM USING THE ONBOARD X4500 GPU BY INTEL AND THE MOBO IS G41RQ.IT IS A NORMAL CASE WITH 450 WATT PSU.TEMPERATURES WHILE NORMAL RUNNING -----HDD: 38 C, CPU - 36 C, MOBO -40 C
I uninstalled the latest intel g41rq graphics driver of intel from the programs and features and let windows install it's own driver( though experiencing a lag in performance). everything works fine now. maybe the intels latest driver is faulty.