bluescreen problem

hey....
I have bluescreen problem in my lenovo laptop......it comes seldomly.....N MY LAPTOP RESTARTS
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Ultimate, 32 bit
Processor: Intel(R) Core(TM) i3-2330M CPU @ 2.20GHz, x64 Family 6 Model 42 Stepping 7
Processor Count: 4
RAM: 2988 Mb
Graphics Card: Intel(R) HD Graphics 3000, 1302 Mb
Hard Drives: C: Total - 51199 MB, Free - 16213 MB; D: Total - 153599 MB, Free - 105167 MB;
Motherboard: LENOVO, Emerald Lake
Antivirus: Microsoft Security Essentials, Updated and Enabled....
PLZ HELP ME TO SOLVE THIS PROBLEM