Okay so here's the deal. Before when I still have the RC version of Windows 7 there wasn't any problems, but as soon as I upgraded from Windows 7 Home Premium some of my drivers
went missing. Windows Update managed to fix those except one, the Coprocessor wasn't able to be installed. I'm not sure but I've been having occasional choppy or laggy video when I'm watching movies or playing games.
I would greatly appreciate it if anyone can help me out.