When you have downloaded the MS Office file via office.com/setup. Search the downloaded Office setup file to open it. Wait for a few minutes to start the installation process. You have to read the licensing agreement before proceeding further. Click on the Install option and let the process to get complete. For the activation of Microsoft Office Suite, you have to open any Office application. Now, enter the Office product activation key once again. Now you have to click on ‘Activate’ option. Wait for a while, till the process gets completed. Now, you may create documents, presentations, spreadsheets and much more with your Office suite via www.office.com/setup.