Activation Problems

Fix Microsoft Office Installed but Not Working After Sign-In

Maira Mehtab Sep 22, 2026 868 views

Question details

The user has purchased and installed Microsoft Office on a desktop computer, but the applications remain unresponsive or locked even after restarting the PC and signing into their Microsoft account.

Product: Microsoft Office
Device & OS: not provided
Scenario: Attempting to use Microsoft Office applications after a fresh installation and sign-in.
Observed behavior: The Office applications cannot be used, indicating a potential license sync, activation error, or installation failure despite being successfully installed.

Before you start

Ensure your computer has a stable internet connection and you have the exact login credentials for the Microsoft account used to purchase your Office subscription.

Solution 1Recommended

Verify Your Microsoft Account and Office License

Ensure that the account you are signing into actually holds the active Office license and matches your purchase.

Often, activation fails because users accidentally sign in with a different Microsoft account than the one used to purchase the software. Verifying the license online confirms that the account holds valid product rights.

Access Microsoft Services

Open your web browser and go to account.microsoft.com/services.

Sign In

Check Subscriptions

Look under the 'Services & subscriptions' section to confirm your specific Office product is listed and marked as active.

Verify in the App

Open an Office app like Word, click on 'File', select 'Account' (or 'Office Account'), and ensure the signed-in user matches the account verified online.

Account Mismatch: If the subscription is not listed online, you may have used a different email address (such as a work or school account) during the initial purchase.

Solution 2

Run the Microsoft Office Repair Tool

Fix corrupted installation files that might be preventing the applications from functioning correctly after sign-in.

Free Microsoft Office alternative

Try WPS Office: A Free and Seamless Alternative

If Microsoft Office continues to have activation or sign-in errors, consider switching to WPS Office. It is a lightweight, highly compatible alternative that does not require complex activation processes, allowing you to get back to work immediately.

1. Download the Installer: Visit the official WPS website and click the download button for the free version.
2. Install WPS Office: Run the downloaded installer and follow the quick setup instructions on your desktop.
3. Open and Edit Files: Launch WPS Writer, Spreadsheets, or Presentation to immediately open and edit your existing Microsoft Office documents.

Highly compatible with Microsoft Office formats including .docx, .xlsx, and .pptx.No complex license verification required to start editing documents.Lightweight installation that takes up minimal system resources.Familiar user interface for a smooth transition from Microsoft Office.

microsoft office alternative - wps office

Frequently Asked Questions

Why does Microsoft Office say 'Unlicensed Product' after signing in?

This usually happens if the signed-in account does not match the account used to purchase the subscription, or if your Microsoft 365 subscription has expired. You can verify your account details at account.microsoft.com.

What does 'reduced functionality mode' mean in Office?

If Office fails to activate or verify your license, it enters reduced functionality mode. In this mode, you can open and view documents, but you cannot edit them or create new ones until the sign-in or activation issue is resolved.

Can I use Microsoft Office offline after installation?

Yes, but if you are using a Microsoft 365 subscription, you must connect to the internet at least once every 31 days to verify your subscription status. If you don't, the apps will ask you to sign in and may enter reduced functionality mode.

Installation & Activation