1. Check that the buit-in graphics driver is NVIDIA GeForce 8400M GT Driver. If it is NVIDIA GeForce 8600M GS, skip this step.
2. Execute Graphics-NVIDIA1.EXE file.
3. Follow the installation wizard that appears.
4. At the License Agreement dialog, read the agreement. Click I Agree to continue with the installation.
NOTE: Several setup boxes may briefly appear during the installation. Follow the installation wizard that appears.
5. When the installation finishes, please restart the computer if needed.