How to Fix Office 2021 Activation PIN Request Loop
Question details
Users are unable to activate or install Office 2021 due to a recurring PIN request that causes an endless 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.
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.
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.
Check the authentication window to see if it mentions 'Windows Security' or resembles your standard Windows lock screen login prompt.
Type the exact PIN you use to sign in to your Windows computer upon startup or waking from sleep.
Click 'OK' or press Enter to allow the system to authenticate your Microsoft account and finish the Office 2021 activation process.

Contact Microsoft Support for Activation Help
If entering your Windows Hello PIN does not break the loop, escalating the issue to Microsoft Support is necessary.
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- 1. Download the Installer: Visit the official WPS Office website and click the free download button.
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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.




