Before you begin, make sure your PC or Mac meets the system requirements.
If you are reinstalling Microsoft 365, you have already redeemed a product key, or you are installing Microsoft 365 at work or school and know you have a license, then go to the section sign in to download and install Office.
However, if this is the first time you're installing Microsoft 365, you may have some pre-installation steps to do first. Expand the Learn more section below for more info.
Sign in to download and install Microsoft 365
Tip: Get tech expertise with Business Assist. Connect with our small business advisors for help making Microsoft 365 products work for you and everyone in your business. Learn more.
Sign in to download Microsoft 365
Go towww.office.com and if you're not already signed in, select Sign in.
Sign in with the account you associated with this version of Microsoft 365. This account can be a Microsoft account, or work or school account. I forgot the account I use with Office
After signing in, follow the steps that match the type of account you signed in with.
You signed in with a Microsoft account
From the Microsoft 365 home page selectInstall Office.
Select Install(or depending on your version, Install Office>).
You signed in with a work or school account
From the home page select Install Office(If you set a different start page, go to aka.ms/office-install.)
Select Office 365 apps to begin the installation.
The 64-bit version is installed by default unless Microsoft 365 detects you already have a 32-bit version of Microsoft 365 (or a stand-alone Microsoft 365 app such as Project or Visio) installed. In this case, the 32-bit version of Microsoft 365 will be installed instead.
To change from a32-bit version to a 64-bit version or vice versa, you need to uninstall Microsoft 365 first (including any stand-alone Microsoft 365 apps you have such as Project of Visio). Once the uninstall is complete, sign in again to www.office.com and select Other install options, choose the language and version you want (64 or 32-bit), and then select Install. (See Install Visio or Install Project if you need to reinstall those stand-alone apps.)
This completes the download of Microsoft 365 to your device. To complete the installation, follow the prompts in the "Install Microsoft 365" section below.
Tip: Don't see an install option after signing in? There could be an issue with your account. Select Need help? from above and review the solutions under Account questions.
Depending on your browser, select Run(in Microsoft Edge or Internet Explorer),Setup(in Chrome), or Save File(in Firefox).
If you see the User Account Control prompt that says, Do you want to allow this app to make changes to your device? select Yes.
The install begins.
Your 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 Microsoft 365 applications on your computer. Select Close.
Installation or sign in issues?
Tip: You can download and install the Microsoft Support and Recovery Assistant to help with Microsoft 365 installation issues on a PC. For more information, see About the Microsoft Support and Recovery Assistant.
If you're having an installation issue such as Microsoft 365 taking long to install, try Need help? for a list of common issues.
Activate Microsoft 365
To open an Microsoft 365 app, select the Start button (lower-left corner of your screen) and type the name of an Microsoft 365 app, like Word.
If you have Windows 8.1 or 8.0, type the name of an Microsoft 365 app on the Start screen. Can't find your Office apps?
To open the Microsoft 365 app, select its icon in the search results.
When the Microsoft 365 app opens, accept the license agreement. Microsoft 365 is activated and ready to use.
Note: The Activation Wizard appears if Microsoft 365 has trouble activating. Complete the steps in the wizard to finish activating Microsoft 365.