Sign-in & Login Problems

How to Fix Microsoft Office Sign-In Window Loading as a Gray Screen

Maira Mehtab Sep 21, 2026 868 views

Question details

The user is unable to log into Microsoft Office because the authentication window gets stuck on a blank, gray screen, even after attempting to reinstall the software and clear credentials.

Product: Microsoft Office
Device & OS: not provided
Scenario: Attempting to sign in to activate Microsoft Office or access cloud services within the desktop applications.
Observed behavior: The sign-in window opens but remains completely gray and fails to load the username and password input fields.

Before you start

Ensure your device is connected to a stable internet connection and temporarily disable any third-party VPNs or firewalls that might block Microsoft's authentication servers.

Solution 1Recommended

Repair or Update Microsoft Edge WebView2

Microsoft Office relies on the Edge WebView2 runtime to display modern sign-in screens. Repairing it often fixes blank or gray rendering issues.

Modern Office authentication windows use web technologies powered by Microsoft Edge WebView2. If this component is corrupted, outdated, or missing, the login screen will fail to render, leaving you with a blank or gray box.

Open Windows Settings

Press the Windows key + I on your keyboard to open Settings, then navigate to 'Apps' and select 'Apps & features' (or 'Installed apps' in Windows 11).

Locate Edge WebView2

Scroll down or use the search bar to find 'Microsoft Edge WebView2 Runtime'.

Repair the Component

Click on it (or the three dots next to it), select 'Modify', and then click 'Repair' in the prompt that appears. Follow the on-screen instructions to complete the process.

Restart Office

Once the repair is finished, restart your computer and open Microsoft Word or Excel to attempt the sign-in process again.

Solution 2

Clear Cached Office Identities in the Registry

Clearing corrupted authentication cache directly from the Windows Registry can force Office to generate a fresh sign-in prompt.

Free Microsoft Office alternative

Switch to WPS Office for a Hassle-Free Experience

If Microsoft Office login issues persist and disrupt your workflow, consider switching to WPS Office. It provides a lightweight, highly compatible, and free alternative that does not rely on complex mandatory authentication modules just to view and edit your essential local documents.

1. Download WPS Office: Visit the official WPS website to download the free installation package for your operating system.
2. Install and Launch: Follow the quick installation steps and open the application. You can start using it immediately without being blocked by mandatory sign-in walls.
3. Open Existing Office Files: Simply drag and drop your existing Microsoft Office files into the WPS workspace to continue editing with all formatting kept intact.

Fully compatible with Microsoft Word, Excel, and PowerPoint formats (.docx, .xlsx, .pptx)No mandatory cloud sign-ins required for offline local document editingLightweight installation that runs smoothly without heavily relying on background web view processesFree to use with a familiar, easy-to-navigate tabbed user interface

microsoft office alternative - wps office

Frequently Asked Questions

Why is my Office sign-in screen completely blank or gray?

This usually occurs due to a corrupted or outdated Microsoft Edge WebView2 runtime (which Office relies on to render web-based login screens), corrupted cached credentials in the registry, or network security software blocking the connection to Microsoft's authentication servers.

Does reinstalling Office fix the gray sign-in screen?

Not always. As many users report, a standard uninstallation might leave corrupted registry keys or cached identities behind. You often need to manually clear these identities or repair the WebView2 component to resolve the underlying issue.

How can I edit my documents if I can't sign in to Microsoft Office?

While troubleshooting the desktop application's login issues, you can use a free alternative like WPS Office to open and edit your local files, or use the free Microsoft Office on the web via your browser.

Can my antivirus or firewall cause the Office sign-in window to stall?

Yes. Strict firewall settings, VPNs, or third-party antivirus software can sometimes intercept and block the secure traffic between the Office application and Microsoft's login servers, resulting in a stalled or gray window.

Login & Account Issues