Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install …

Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.

If you haven't installed Office on another computer yet, follow the instructions in Install Office on your PC or Mac. Follow the steps in Activate by telephone, described above.

Office Home & Business 2024 – For families and small businesses who want classic Office apps and email installed on one PC or Mac for use at home or work. Includes classic versions of Word, Excel, …

Alternatively, if you have successfully installed Microsoft 365 or Office on your computer, but need help with activating or reactivating it, please go to: For Microsoft 365 - Activate Office.

Please complete to order this offer as soon as possible and redeem the product key with your Microsoft account. If more than that days have passed, your Microsoft account will lose eligibility to get this …

If you need to re-install the Office or Microsoft 365 apps, we recommend that you uninstall Office first. After you've uninstalled the apps, follow the steps below.

Download and install or reinstall Office 2021, Office 2019, or Office 2016. Important: Support for Office 2016 and Office 2019 ended on October 14, 2025 and there will be no extension and no extended …

Get help with product key errors, or geographical region errors, when you redeem a new Office product key on Office.com/setup.

This article applies to Office Home & Business, Office Professional, and individually purchased Office apps. To switch an Office install to or from Microsoft 365, see Switch your Office license.