hi, i'm new i don't know how to start, eventhough i'm expecting someone else to rectify my error.

motherboard Asus: M4A78T-E
Processor : Phenom II x4 810
Harddisk : wd 500gb
Transcend : 2gb 1333
G.card : xfx 5750
Win7 ultimate 32 and 64 bit

I was bought 6 month ago, after 2 month this bsod , freezing problem occurs then i replaced my motherboard and ram. i bought another hdisk , evnthough this problem have not came to end. previously i dont have graphics card bcoz my motherboard has inbuild gf. last week i bought xfx 5750.
I formatted and installed all driver from asus_support except chipset bcoz I don't need crossfirex while g.card has 1gb ddr5. from xfx driver support i installed driver from there.
I updated my BIOS. and I took memtest86+ for more than 10hr,no error occured. error are
bad pool header .sys
ntfs.sys
fileinfo.sys
fltmgr.sys
win32k.sys.
Is anyone alive pls give me a solution for my processor.