|After you installed Windows 7, did you:|
Update your drives all to Windows 7 drivers?
Update Windows 7?
Go to power settings and make sure all are appropriate for a laptop?
Install the latest Flash Player?
Are you using the laptop on a hard surface or on your bed,lap, etc?
Blow dust out of your laptop using compressed air can.
Install SpeedFan to monitor temperatures.
Post back results
You have to be a little bit crazy to keep you from going insane.