Whenever I play a game (NBA 2K11 for example) it'll play for about 10-20 min., then after that it'll just freeze up and the computer will just turn off itself. Any ideas of why this is happening? 

My Computer
At a glance
Windows 7 Home PermiumIntel Core i5 CPU M 430 @ 2.27GHz3 GBNVIDIA Geforce GT 330M
- Computer Manufacturer/Model Number
- Dell Inc.
- OS
- Windows 7 Home Permium
- CPU
- Intel Core i5 CPU M 430 @ 2.27GHz
- Motherboard
- Dell
- Memory
- 3 GB
- Graphics Card(s)
- NVIDIA Geforce GT 330M
- Sound Card
- HD Audio
- Screen Resolution
- 1600X900
- Hard Drives
- 465 GB
- Keyboard
- Laptop
- Mouse
- Logitech Wireless Mouse
- Internet Speed
- Cable