Step by Step Instructions How to Download and Install or Reinstall Office 365 or Office 2016 on PC

Please make sure your computer meets system requirements before you begin. Office 365 is designed to work best with Office 2016, Office 2013, and Office 2016 for Mac. Previous versions of Office, such as Office 2010, Office 2007, and Office for Mac 2011 may work with Office 365 with reduced functionality. An internet connection is required in order to access, download, install, or activate Office.

Office for home: Note that some Office for home products come with a product key. If you have a key, sign in at with an existing Microsoft account or create a new Microsoft Account. Enter your product key.

Office for business: If your Office for business subscription plan includes the desktop version of Office and your company allows you to install it, you will need an assigned license.

STEP 1 - Sign in and download Office

How to Install Office on a PC

  1. Go to and select Sign in.

  2. Sign in with the associated account for this version of Office. The account can be a Microsoft account, a work account, or school account. If you don’t remember your sign-in details see “I forgot the account I use with Office”.

  3. On the Office home page, do one of the the following, depending on which version of Office you are installing.

If you signed in with a Microsoft account, from the Office home page select Install Office > Install. (Office 365 subscribers should select Install again).

Office apps

If you signed in with a company or school account, from the Office 365 home page select Install Office apps > Office 2016. (If you designated a different start page, go to

Office apps

TIP: If you want to install Office in a different language, or if you’d like to install the 64-bit version (PC), select the link: Language, 32/64-bit, and other install options. Select the language and bit version you’d need and select Install.

This will begin the Office download. Follow the instructions onscreen to complete installation.

If you don’t see an install option after signing in, there could be an issue with your account. Select Need help? and review Account questions.

STEP 2 - Install Office

How to Install Office on a PC

  1. Click Run (Edge or Internet Explorer), Setup (Chrome), or Save File (Firefox). You may see the User Account Control prompt that read, Do you want to allow this app to make changes to your device? Click Yes to proceed. This will begin your installation.

  2. The installation is finished when you see the message, You're all set! Office is installed now. An animation will play to indicate where to find Office applications on your computer.

  3. Follow the onscreen instructions in the window. Example: Click Start > All Apps to locate your apps, then select Close.

    "You are all set! Office is installed now" screen

If you have trouble installing Office, check out FAQs for a list of common issues.

STEP 3 - Activate Office

How to Install Office on a PC

  1. Activation is easy. Begin using any Office product. In most cases, Office is activated once you open an application and click Accept to agree to the License terms.

    Accept and Agree window

Office may not activate automatically. Depending on the product, you may see the Microsoft Activation Wizard instead. This will prompt you through activating your product.

MS Office Activation Wizard

For more activation help check out If you need activation help, see Activate Office 365, Office 2016, or Office 2013.