Now you will need to open up an elevated command prompt window. 
Howtogeek does not teach you how to cook.
Open the start menu in Windows 7 and 10 or open the search function in Windows 8 and search for CMD.  
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Next, right-click on it and then press “Run as administrator.”  While you don’t need to open an elevated command prompt window, it will help you to avoid any pesky confirmation dialog boxes. 
Martin Hendrikx is a writer.