Software & Apps MS Office How to Install or Reinstall Microsoft Office A Step-by-Step Guide to Install or Reinstall Office on Any Windows Device By Joli Ballew Writer Joli Ballew is a former freelance contributor to Lifewire and Microsoft MVP, Lynda.com trainer, Microsoft Press author, and college professor. our editorial process Joli Ballew Updated March 20, 2020 MS Office Word Excel Powerpoint Outlook Tweet Share Email Microsoft Office is available to buy directly from Microsoft online or from big box stores and third-party retailers. After you make the purchase, download the software and install it. Here are the steps you'll follow to install Microsoft Office on any Windows laptop, computer, or tablet. Instructions in this article apply to Office 365 or Office 2019 on Windows or Mac. How to Install Microsoft Office After you purchase Microsoft Office, activate and download the product. Detailed instructions are included in the packaging if you buy the software at a retail store or order a key card online from someplace like Amazon. If you order directly from Microsoft, you'll get the link in an email. There’s an "Install Office" link on the receipt. Otherwise, go directly to setup.office.com to begin. If your organization uses volume license versions, your company's IT department might use a different method to install Office. Talk to your IT department for installation help. Sign in with your Microsoft account or create a new account. Enter your product key (or activation code). This product key lets Microsoft know the software was purchased legally. The key also comes with any physical packaging you receive and is included in an email if you ordered digitally. Select your country or region and language, as well. Write this activation code down and keep it in a safe place. You’ll use it if you need to reinstall Microsoft Office. Select Install Office. After the installation file is downloaded, what happens next depends on which web browser you use. The easiest way to install Microsoft Office is to use the Edge browser. When you select Install, a dialog window at the bottom prompts you to either run the file, save it, or cancel. Select Run and work through the installation process. If you use Chrome, for example, the file automatically goes to your Downloads folder and appears in the Download Manager at the bottom of the screen. Select the file to run it. If the User Account Control asks whether you want to allow the app to make changes to your device, select Yes. Install Microsoft Office. Once you run the downloaded file, the installation process begins automatically. If Windows asks if you want to allow the installation, select Yes. If it prompts you to close any open programs, select Yes. The install is finished when you see the phrase, "You're all set! Office is installed now" and an animation plays to show you where to find Office applications on your computer. Select Close. That’s it! Microsoft Office is now installed and ready to use. Note that you might be prompted to install updates to Office. If so, allow those updates to happen. To reinstall Microsoft Office, go to My Account and select the download link if you don't already have the installation file on your hard drive. Then, follow the instructions outlined above. If you do have the file, run it to begin the installation process again.