How do I activate Microsoft Office freely?

Step 1: Go to www.office.com/setup or Microsoft365.com/setup. Step 2: Sign in with your Microsoft account, or create one if you don't have one. Be sure to remember this account so that you can install or reinstall Office later, without a product key.

If you bought a new Microsoft 365 product key card, or you received a product key when you bought Microsoft 365through an online store, go to Office.com/setup or Microsoft365.com/setup and follow the on-screen prompts.

Microsoft 365 for the web is a free version of Microsoft 365 that you can use in a web browser. All you need is to sign up for a Microsoft account with a new or existing email address. Try the Office for the web apps. Not sure what you have now?

Activation of Microsoft Office 2016, 2019 and 2021 Log into your computer with an administrator account. Change to the directory where Microsoft Office is installed. cscript ospp. vbs /act to complete the activation process.