Recently I upgraded my OS from Vista 64 bit to Windows 7 64 bit. With the upgrade my graphics drivers were also updated. The problem is that I'm unable to watch videos or listen to music after about 2 hours of usage. Basically when my computer is turned on it works fine but after a few hours of usage all my video programs crash. I have to continually restart my computer every few hours in order to watch videos and listen to music. I've been googling for about 2 hours to find a solution, no results thus far. Please note I thought it was a registry issue at first and I used a registered version of Registry Easy but the problem was not solved. Any suggestions are appreciated.