1. Extract the .cab file to a folder of your choice
2. Go to Device Manager (right click on My Computer, choose Manage and then find Device Manager in the left panel), or right click on Start Menu for Windows 10 and select Device Manager
3. Right click on the hardware device you wish to update and choose Update Driver Software
4. Choose to select the location of the new driver manually and browse to the folder where you extracted the driver
5. If you already have the driver installed and want to update to a newer version got to "Let me pick from a list of device drivers on my computer"
6. Click "Have Disk"
7. Browse to the folder where you extracted the driver and click Ok  

About Graphics Drivers:

While installing the graphics driver allows the system to properly recognize the chipset and the card manufacturer, updating the video driver can bring about various changes.

It can improve the overall graphics experience and performance in either games or various engineering software applications, include support for newly developed technologies, add compatibility with newer GPU chipsets, or resolve different problems that might have been encountered.

When it comes to applying this release, the installation steps should be a breeze, as each manufacturer tries to make them as easy as possible so that each user can update the GPU on their own and with minimum risks (however, check to see if this download supports your graphics chipset).

Therefore, get the package (extract it if necessary), run the setup, follow the on-screen instructions for a complete and successful installation, and make sure you reboot the system ...