I got sims 2 for christmas and i installed it , it worked fine for a few hours but now every time i load it it will play for roughly 15 minutes but then shut off and give this messgae

"The ialmrnt5 display has stopped working normally. Save your work and reboot the system to restore full display functionality. The next time you reboot the machine a dialog will be displayed giving you a chance to upload data about this failure to Microsoft"

Also this pos up:

"The graphics adapter in this system experienced an internal error. Please contact you graphics adapter manufacturer for technical support. The application will now terminate"

I have no clue waht any of this means..
but i read that i neede to find out the name, manufacturer and chip type so here they are : Name- Intel® 82915G Express Chipset Family
Manufacturer- Intel Corporation
Chiptype- Intel® 82915G Express Chipset Controller



please help me