Videos not working

Hi,

My problem is that whenever i try to play a video on facebook or youtube or on any other website the video does not work. The video just displays green color and i can only hear the audio and after few seconds the browser not responds and i have to close it from the processes menu. This problem is on all the browsers for ex : chrome, ie, firefox, opera, safari etc. My all the drivers are up to date, even the flash player is the latest one v.11. Please Help.:)

Still facing a problem.

yes its there