Just wanted to share my solution after having my HP dv9000 down for over a year because I didn't want to deal with the BSOD, pixelated screens and automatic shutdowns.
First, I took a deep breath, then chased it with a shot of whiskey. Now you're ready. I then carefully! Took the computer apart, just enough to get to the fan, then blew compressed air into it, be careful not to let the fan just spin freely, as not to mess up the bearings. Then carefully put it back together. There are youtube videos on this, but if you're not comfortable, you might be able to get away with blowing air through the casing?
Next, I started my computer in Safe Mode with Networking. Then, use the Control Panel to navigate to the Device Manager (Under the Hardware Tab of System Properties). Select Display Adapters, your NVIDIA GeForce 7600 should be displayed. Double click it. Select the Driver tab. Select Roll Back Driver. Then shut down your lap top.
Finally, PERFORM A HARD RESET. To do this: After your laptop is shut down, remove the charger and the battery. HOLD DOWN the power button for 30seconds. Then insert the laptop charger first then the battery. Turn on your laptop. After booting up it might prompt you to do a fix, after running through this prompt, it probably won't find a fix, that's ok. Proceed with logging on as normal. And with that I hope you have some resolution to this hell if the laptop hasn't already completely destroyed itself.
GOOD LUCK kittens