Select a tab Buy MS Outlook 2017 64 bit to learn more about your options. You can choose to purchase an Office subscription or the newest one-time purchase version. When you're ready to install the newest version, see the section below, I'm ready to install Office and follow the upgrade recommendations. How do I buy the latest version? Buy an Office subscription Purchasing Office is your best option. You'll always have the latest features, security updates, and other improvements. Choose between Office Personal for one person or Office Home which you can share with your family. You Buy MS Outlook 2017 64 bit only install these versions of Office on one device. See the next section for a list of upgrade recommendations. I have the latest version and I'm ready to install it Before installing the latest version of Office read through the following recommendations first. Upgrade recommendations Make sure your computer meets the system requirements for the newest version of Office. In most cases when you run the Microsoft Office Setup program on a computer with an earlier version of Office installed, the earlier version is removed. However, there are instances when an uninstall is necessary, such as if you run into errors or problems during installation. If you uninstall Office before installing the new version, your Office files won't be deleted, but if your version of Office includes Outlook you may want to back up your Outlook data files.