Windows 7 Helpless

[dnoam]

roblem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 2057

CCode: 3b
BCP1: 00000000C0000005
BCP2: FFFFF960001660D0
BCP3: FFFFF8801B8B5D00
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

This is what i get and i ahve no idea where to start , i need some seriuos help here .Thanks