Installing Office 2019 without a product key How to download and Install Office 2019 from Microsoft homepage? If you have an Office 365 subscription, your Office will be upgraded to the latest version automatically without doing anything. However, if you are using Office 2016 or earlier versions, to make sure that Office 2019 will work normally, please  uninstall your old version of Office  completely before starting a new installation.  Microsoft Off ice Professional Plus 2019 (32&64bit)  |  2016 (32&64bit)   Windows OS Professional edition 10 (32bit)  |  10 (64bit) After the download process is complete, you will get an image file. Just open it then run the setup file to install Office 2019 on your PC. Activating Office 2019 using KMS license key Method 1: Running commands one by one manually Time needed: 1 minute. Manually activate your Office with legal KMS product key. Open command prompt in administrator m...