my laptop automatically shuts down while playing games or videos.

[latitude e6400]

My laptop automatically shuts down whenever i am playing games or videos on facebook its been happening since my laptops shutdown button stopped responding and the vendor installed windows 7 ultimate before it i had a win 7 home basic.please tell me a solution.i have a dell latitude e 6400 series and a core2duo processor.

 

[iceblitzed]

is this a problem on one browser like internet explorer, have you tried firefox or chrome browser
http://www.getfirefox.com