Some Office 2019, Office 2016, and Office 2013 products come with a product key. If yours did, before installing Microsoft 365 for the first time, sign in with an existing or new Microsoft account and enter your product key at office.com/setup .

Use the Office offline installer to install Office 2016 or Office 2013 if you don't have an active Internet connection or you're having problems with slow speed or unreliable connections.

To help you resolve this, try the solutions below. We’ve listed the most common solutions first so try the steps in the order they're listed. Make sure Office is updated to Version 2102 (Build 13801.20808) or later. If you're not setup for automatic updates do the following:

You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape. You might want to use the Inbox Repair tool in the following situations:

Install the 32-bit or 64-bit version of Office. Select your version below and follow the installation steps. Microsoft 365, Office 2019, or Office 2016 (Follow the steps to select a specific bit version, such as 64-bit if that's the version you need.)

If you don't see Office on your device after doing a Recovery in Windows (also known as Push Button Reset), you must reinstall Office by following the steps in the ReadMe file that was copied to your desktop after the recovery completed.

Microsoft has discovered a vulnerability in Office Visual Basic for Applications (VBA) macro project signing. This vulnerability might enable a malicious user to tamper with a signed VBA project without invalidating its digital signature.

To install either the 32 or 64-bit version of Microsoft 365, Office 2021, or Office 2019, follow the steps in Install Office on a PC. Important: If you install the 64-bit version, but want the 32-bit version instead, you must first uninstall the 64-bit version before installing the 32-bit version.

Install earlier versions of Microsoft 365 first. For example, install Office 2016 before installing Office 2021 or Office 2019. This also applies to other products from the Microsoft 365 family, like Visio, Project or Access Runtime as well as Language Packs and Proofing Tools.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.