Some of the Office products listed under Office for home may have come with a product key. Redeem your key first by signing in at with an existing or new Microsoft Account and then Install Office Product Key. See I have a new product key. Where do I enter it? If you have an Office product listed under Office for business you likely received a license giving you permission to Install Office With Product Key through work or school. You can check this by following the steps in What Office 365 product or license do I have?

Step 1 – Sign in to download Office

1. Go to and if you’re not already signed in, select Sign in.

Note: If you bought Office for personal use through your company’s Microsoft HUP benefit, you may not be able to sign in here. Find installation help at Install Office through HUP.

2. Sign in with the account you associated with this version of Office. This account can be a Microsoft account, or work or school account.

Forgot your account details? See

3. On the Office home page, do the following depending on your version of Office.

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

This begins the download of Office. Follow the prompts on your screen to complete the install.

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 Account questions section.

Step 2 – Install Office Product Key

1. Depending on your browser, click Run (in 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? Click Yes.

The install begins.

Note Registration of a Microsoft Office product does not provide to us your proof of purchase for that product. You should maintain any receipts or records of your purchases of Microsoft products in case you need to obtain replacement media or product keys. For more information about obtaining replacement media or product keys, click the following link Activate office 2016 with a product key.

After following above mentioned method, try to open email attachments, if it does not work, reinstall your MS Office suite. Before installation, completely uninstall it from your computer. Then, open downloaded documents.

If you fail to open Office documents even after Office suites reinstallation, then there is chance of document corruption. To fix the corrupted documents, you can make use of File Repair Tool. In case, you want to repair Word files, then use Word Repair Tool. The software comes handy to activate office 2016 with a product key

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 Office applications on your computer.
Follow the instructions in the window, for example Click Start > All Apps to see where your apps are, and select Close.

Installation or sign in issues?

If you’re having installation issue such as Office taking long to install, try Need help? for a list of common issues.