1. Click on an Office application icon (In the example the Microsoft Word Icon). (See Figure 1.)

Figure 1. - Microsoft Word Icon on the Start Menu in Windows 8.1 and Windows 10

2. As your Office Application opens for the first time, you will be prompted to activate the product.. Click the Activate button to start the activation process. (See Figure 2.)

3.

Figure 2. - Let's get started with the Office Activation process.4. If you are not currently signed into your Microsoft Account (MSA) you will see this screen:

(See Figure 3)

Figure 3. - If Windows on the system is not signed in using a Microsoft Account (MSA), you are prompted to sign in to your Microsoft Account (MSA)

If you are currently signed into your Microsoft Account (MSA) you will see this screen: (See Figure 4)

Figure 4. - If Windows on the system is signed in to a Microsoft Account (MSA), you are prompted to CONFIRM your Microsoft Account (MSA)

5. Next you will be prompted to select your Country and Language preferences. (See Figure 5.)

Figure 5. - Selection of Country and Language during Office activation

6. If you have multiple Office product keys tied to your MSA, you will see them listed. Select the one on top to activate Office. (See Figure 6.)

Figure 6. - Selecting the top option to activate Office (If you have multiple product keys associated with your MSA)

7. Accept Office Updates (See Figure 7.)

Figure 7. - First things first, Accepting the Office updates.

8. You are all set and can now start using your Office app. (See Figure 8.)

Figure 8. - Office 2016 or 365 setup is now complete.

9. Now we need to make sure this product was successfully activated. To do this, go to File > Account in your Word document. DO NOT CLICK Activate Product at this point. Instead click the Update Options next to Office Updates and select "Update Now" (See Figure 9.)

Figure 9. - Check Office updates.

10. Let Office run through the updates and once complete (Time for this varies based on the speed of your internet connection and the version of Office purchased.), check back to the same location to ensure the product is successfully activated like the example below (See Figure 10.)

Figure 10. - Office Activated.