Try guided support. If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.

Go to office.com/setup and sign in with an existing Microsoft account or create a new one, then enter your product key. Follow the remaining prompts to finish linking your Microsoft account with this version of Microsoft 365. No product key or not sure if you need one? See Using product keys with Office.

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 .

Here are the common errors and how to fix them. This product key has already been used. Your product key can only be redeemed once. It isn't meant to be re-used or shared.

1. Check your speaker output. 2. Run the audio troubleshooter. 3. Verify that all Windows Updates are installed. 4. Check your cables, plugs, jacks, volume, speaker, and headphone connections. 5. Check sound settings. 6. Fix your audio drivers. 7. Set your audio device as the default device. 8. Turn off audio enhancements. 9. Restart Audio Services

How to get this update. This update is available through the following release channels. Prerequisites. The PC must have 250 MB of free space in the recovery partition to apply this update. Restart information. You do not need to restart your PC after applying this update. Verify the installation of this update.

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.

Check the sections below to find out if you need an Microsoft 365 product key and what to do with your key if you have one. You just bought Microsoft 365. Where do I enter my new product key? My new Windows PC came with Office but I can't find a product key. I bought a product key card but there's no key on it. You're using Microsoft 365.

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. This is a one-time process that adds your new product to your Microsoft account.

Find your Office product key. Office 365 Office 2019 Office 2016 Office 2013. Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead. Using product keys with Office.