Follow the instructions below to install office on a Windows computer:
Go to office.com/setup.
Sign in with your Microsoft Account, If you don’t have an Office account you can create a new one.
Select Install Office.
Enter your product key.
Install your Office 365 or Office 2016 on your PC or Mac.
Depending on your browser.
Click Save.
Run, Setup or Save File.
Open the file you saved and follow the onscreen Instructions.