Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 18441

Additional information about the problem:
BCCode: 18
BCP1: 00200003
BCP2: 874D64C0
BCP3: 00000002
BCP4: 81D5C83F
OS Version: 6_0_6001
Service Pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\Mini032709-03.dmp
C:\Users\acer\AppData\Local\Temp\WER-34694-0.sysdata.xml
C:\Users\acer\AppData\Local\Temp\WERA997.tmp.version.txt

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How to fix? -'-