Getting BSoD after installing Graphics Driver in Notebook

Hi,

I've purchased HP Pavilion G6-2314AX notebook without os last year, my laptop get frequently stopped due to BSoD while loading windows and sometime notebook automatically restarted and stops on BSoD and it shows something like memory dump.I've tried to install new OperatingSystem(Windows 7) on laptop its successfully installed but after installing Graphics drivers its showing BSoD while loading windows. Please help me resolve this issue.  

Thanks in advance.

Regards,

J