Hi there,
if you use the link given above and download the Nvidia LAN Driver you should get a 7Zip folder on your desktop.
Double click the 7Zip folder and a dialogue box comes up asking where you want to extract the files to. Make sure this is your desktop.
You may get another box pop up asking you to confirm your action.
click the run button and the 7Zip file will be extracted onto your desktop as a folder.
Open the folder and you should see a list of items
you need to click the icon that says: Lsetup and the Install procedure will run automatically. You will be asked to confirm the install of the drivers though so click the boxes as appropriate.