HOW TO DOWNLOAD DRIVERS FROM NVIDIA :
To download drivers from NVIDIA do the following steps:
-Go to NVIDIA download page.
You can get the Graphics card model under category “Display adapters” in Device Manager.
Click Download button.
After download completes, just double-click on the downloaded file (.exe file) and follow the on-screen instructions to install the driver.
The driver will be installed in Express way by default. In this way, all components in the whole driver package will be installed. If you just need to install HD audio drivers and not the whole driver package, choose Custom Install and uncheck the other optional driver packages.