Activation Problems

How to Fix Office 2021 Activation PIN Request Loop

Bushra ParveenBushra Parveen Oct 13, 2026 871 views

Question details

Users are unable to activate or install Office 2021 due to a recurring PIN request that causes an endless loop.

How to Fix Office 2021 Activation PIN Request Loop
Product
Microsoft Office 2021
Device & OS
Windows
Scenario
Activating or installing Microsoft Office 2021 on a Windows device.
Observed behavior
The system repeatedly prompts for a PIN. Selecting 'I forgot my PIN' fails to resolve the issue and simply returns the user to the same PIN request page.
Before you start

Ensure your Windows operating system is fully updated and check your Windows Settings to see if a Windows Hello PIN is currently configured for your account.

Solution 1Recommended

Use Your Windows Hello Sign-In PIN

The PIN prompt is often triggered by Windows Hello security rather than an Office-specific activation code. Entering your computer's unlock PIN can resolve the loop.

During Microsoft Office 2021 activation, the authentication system utilizes Windows Hello credentials to verify your identity. If a PIN is configured on your Windows device, the prompt is actually requesting your local system PIN, not a product key.

1
Identify the Prompt Type

Check the authentication window to see if it mentions 'Windows Security' or resembles your standard Windows lock screen login prompt.

2
Enter the Windows PIN

Type the exact PIN you use to sign in to your Windows computer upon startup or waking from sleep.

3
Complete Activation

Click 'OK' or press Enter to allow the system to authenticate your Microsoft account and finish the Office 2021 activation process.

Use Your Windows Hello Sign-In PIN
Password Alternative: If you are unsure of your Windows PIN, look for an option labeled 'Sign in with a password instead' on the prompt window.
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Frequently Asked Questions

Why does Office 2021 ask for a PIN instead of a password?

Office 2021 integrates with Windows Hello, which uses a device-specific PIN for faster and more secure authentication. It requests this PIN to verify your identity locally before activating the software.

How do I reset my Windows Hello PIN to fix the loop?

Go to Windows Settings > Accounts > Sign-in options. Select 'Windows Hello PIN' and click 'I forgot my PIN'. Follow the prompts to verify your Microsoft account password and set up a new PIN.

Can I bypass the PIN prompt during Office activation?

You can often click the 'Sign in with a password instead' link located beneath the PIN entry field on the prompt. Alternatively, you can temporarily disable Windows Hello PIN in your Windows Sign-in settings, complete the activation, and re-enable it later.