Graphics Reset

Hello everyone
About a month ago, one of my laptops had an error while instaling Service Pack 1 for Vista. Unable to start Windows, I decided to install Windows 7. I still don’t know how nor why, but it seems as the graphics reseted.
I’m supposed to have NVIDIA GeForce 8400M GT GPU.
This is the data provided by Piriform’s Speccy:
Graphics
      Monitor
         Name   Monitor N�o PnP Gen�rico on Adaptador de gr�ficos VGA padr�o (non-PnP Gen�ric Monitor on Standard VGA graphics adaptor)          Current Resolution   1280x800 pixels
         Work Resolution   1280x760 pixels
         State   enabled, primary, VgaCompatible
         Monitor Width   1280
         Monitor Height   800
         Monitor BPP   32 bits per pixel
         Monitor Frequency   1 Hz
         Device   \\.\DISPLAY1\Monitor0
      Standard VGA graphics adaptor
         GPU   G86M
         Device ID   10DE-0426
         Revision   A2
         Subvendor   Sony (104D)
         Technology   80 nm
         Die Size   115 nmІ
         Transistors   210 M
         Release Date   May 09, 2007
         DirectX Support   10.0
         DirectX Shader Model   4.0
         OpenGL Support   3.0
         BIOS Version   Chip Rev   
         ROPs   8
         Shaders   16 unified
         Memory   14 MB
         Bus Width   128 Bit
Now, I can’t run many aplications and games. I’m unable to inicialize DirectX
I’ve tried installing:
http://www.nvidia.com.br/object/notebook-win7-winvista-260.99-whql-driver-uk.html
but it says it can’t find compatible hardware.
Any help? Thanks in advance

Answer #1
try this site for “custom” drivers
http://laptopvideo2go.com/
some lappy mfg’ers don’t want nvidia supporting their video and this site “fixes” that with a modded INF file
or you could try installing the vista drivers from your lappy’s support site, if there’s no 7 ones
Answer #2
didn’t work, but thank you anyway
Answer #3
didn't work
after replacing the INF ?
Answer #4
after following both advices
Answer #5
any error while trying to install after replacing the INF
Answer #6
Everything stays the same
Answer #7
what laptop is this ??
Answer #8
Install directx 10