Installing the driver you linked resulted in the same problem. Here is the information you asked for and some I thought might also be useful.
Device Status: Working Properly
Device Description: NVIDIA GeForce 9600M GT
Hardware Id's:
PCI\VEN_10DE&DEV_0647&SUBSYS_00B0106B&REV_A1
PCI\VEN_10DE&DEV_0647&SUBSYS_00B0106B
PCI\VEN_10DE&DEV_0647&CC_030000
PCI\VEN_10DE&DEV_0647&CC_0300
Compatible Id's:
PCI\VEN_10DE&DEV_0647&REV_A1
PCI\VEN_10DE&DEV_0647
PCI\VEN_10DE&CC_030000
PCI\VEN_10DE&CC_0300
PCI\VEN_10DE
PCI\CC_030000&DT_0
PCI\CC_030000
PCI\CC_0300&DT_0
PCI\CC_0300
Here is the current driver information I pulled from the Nvidia control panel.
NVIDIA System Information report created on: 05/18/2011 11:48:28
System name: YACHTZSPC
[Display]
Processor: Intel(R) Core(TM)2 Duo CPU T9550 @ 2.66GHz (2654 MHz)
Operating System: Windows 7 Professional, 64-bit
DirectX version: 11.0
GPU processor: GeForce 9600M GT
Driver version: 188.61
CUDA Cores: 32
Core clock: 393 MHz
Shader clock: 786 MHz
Memory clock: 700 MHz (1400 MHz data rate)
Memory interface: 128-bit
Total available graphics memory: 2291 MB
Dedicated video memory: 512 MB
System video memory: 0 MB
Shared system memory: 1779 MB
Video BIOS version: 62.94.78.00.13
IRQ: 16
Bus: PCI Express x16
[Components]
nvCplUIR.dll 2.5.690.05 NVIDIA Control Panel
nvCpl.cpl 2.5.690.05 NVIDIA Control Panel Applet
nvCplUI.exe 2.5.690.05 NVIDIA Control Panel
nvViTvSR.dll 8.16.11.8861 NVIDIA Video and TV Server
nvViTvS.dll 8.16.11.8861 NVIDIA Video and TV Server
nvDispSR.dll 8.16.11.8861 NVIDIA Display Server
NVMCTRAY.DLL 8.16.11.8861 NVIDIA Media Center Library
nvDispS.dll 8.16.11.8861 NVIDIA Display Server
NVCPL.DLL 8.16.11.8861 NVIDIA Compatible Windows7 Display driver, Version 188.61
PhysX 09.10.0129 NVIDIA PhysX
NVCUDA.DLL 8.16.11.8861 NVIDIA CUDA 2.2 driver
nvGameSR.dll 8.16.11.8861 NVIDIA 3D Settings Server
nvGameS.dll 8.16.11.8861 NVIDIA 3D Settings Server
Thanks for your help!