EliteBook 8440p stuck, hangs & gives BSOD randomly, no pattern found

[Cylu]

EliteBook 8440p stuck, hangs & gives BSOD randomly, no pattern found

I have an HP EliteBook 8440p
i installed Windows 7 Professional in it. I got it second hand and i dont have much past history about it.
But since the installation it is hanging, stucking and giving BSOD randomly.. sometime opening Chrome, sometime listening to song, sometime playing Windows games. Sometime while moving it or just changing it a little like while i m sitting on couch and moves forward a little.. I opened it and tightened hard disk screws and memory...

Specs:
EliteBook 8440p
Intel i5
RAM 2 GB
Windows 7 Professional

Attached are all the files required according to the Forum Posting Instructions.

Any help will be greatly appreciated

 

[Cylu]

System crashed again.. just pulled the laptop screen a little forward...
crash dump is attached

 

[Cylu]

is my problem too complicated or i have failed to give some information?

 

[Cylu]

I am still facing this problem..
Anyone can help me?