blue screen windows 7 please help

I have dell laptop was working fine then it started crushing with blue screen
these are the details i get after every blue-screen
may guys help me to solve the problem please
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: a
BCP1: D9100950
BCP2: 00000002
BCP3: 00000000
BCP4: 82A4D61C
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\102612-34429-01.dmp
C:\Users\dell\AppData\Local\Temp\WER-51651-0.sysdata.xml

Read our privacy statement online:
Windows 7 Privacy Statement - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt