Another great option nowadays is to use winget (if you have Windows 10 v1709 or greater). In the Command Prompt, enter:
winget install Microsoft.NuGet
(below follows some extra information for the curious mind) This will:
Install the official nuget.exe in your PC.
Create a Symbolic Link here: %localappdata%\microsoft\winget\links
Make the nuget.exe globally available for your user to call it from anywhere, since the aforementioned directory should be present in your user's PATH variable.