blue screen of death...

i followed this video
so pls help me out


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Dump File : 110312-46145-01.dmp
Crash Time : 11/3/2012 11:48:00 AM
Bug Check String : BAD_POOL_HEADER
Bug Check Code : 0x00000019
Parameter 1 : 0x00000020
Parameter 2 : 0x8520d000
Parameter 3 : 0x8520d300
Parameter 4 : 0x08600000
Caused By Driver : ntkrnlpa.exe
Caused By Address : ntkrnlpa.exe+121c6b
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7601.17944 (win7sp1_gdr.120830-0333)
Processor : 32-bit
Crash Address : ntkrnlpa.exe+121c6b
Stack Address 1 : ntkrnlpa.exe+613d5
Stack Address 2 : ntkrnlpa.exe+61664
Stack Address 3 : ntkrnlpa.exe+61985
Computer Name :
Full Path : C:\Windows\Minidump\110312-46145-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 7601
Dump File Size : 143,728
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