If you already own a product key or have it linked to your account, follow these steps from the official Microsoft Support guide :
: Open the downloaded .exe file. Click Yes if prompted by User Account Control. If you already own a product key or
Support for Office 2016 and Office 2019 ended on October 14, 2025 and there will be no extension and no extended security updates. Microsoft Support Microsoft Support End of support for Office 2016
End of support for Office 2016 and Office 2019 | Microsoft Support Activation Once installed, open any app like Word or Excel
: Under Services & Subscriptions , find "Office Professional Plus 2019."
: The installer will download the remaining files. Stay connected to the internet until you see "You're all set! Office is installed now." 3. Activation Once installed, open any app like Word or Excel .