Hi there,
if you use the link given above and download the Nvidia LAN Driver you should get a 7Zip folder on your desktop.
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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.
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You may get another box pop up asking you to confirm your action.
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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
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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.