Once the download is complete, right click on the downloaded file and choose the “Mount” option from the dropdown menu
After the ISO file that you downloaded is mounted, you can access it from your Computer as a DVD drive. Here you can run the installer.
Complete the program installation and enter the "activation key" during or at the end of the process.
Once the download is complete and the installation of the program is complete, enter the activation key when running any application from the Microsoft Office package, it will be the first thing that will ask you.
During the installation of Microsoft Office you should have been prompted to enter the product key we sent you. In the case this didnt happen please start Word, click on FIle, then on Account and enter the provided key here. If you don´t do that your purchased Office will turn into a trial version after 30 days.