Can you help me?

Bad_Pool_Caller
0x000000C2 (0x00000007,0x000000CD4,0x02120001,0x88DC0F08) I am using windows XP SP2 Home Edition. When I startup my computer it goes through its normal startup procedure, the icons appear it continues for a minute or so and then the blue screen appears. I can still access the Internet through my "Safe Mode." My computer is a Sony Vaio Desktop R- Series VGC-RA30MG. Intel Pentium 4, 3.60GHz, Mother Board: PTGD2-VX by ASUSTeK Computer Co. Total Memory 2047MB