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How to Stop Microsoft Word Asking to Install Microsoft Defender

Maira Mehtab Sep 20, 2026 869 views

Question details

Users are experiencing a recurring issue where Microsoft Word continuously displays a banner prompting them to install Microsoft Defender, despite Windows Defender already being active on their system.

Product: Microsoft Word
Device & OS: not provided
Scenario: Opening or actively working on documents within a Microsoft 365 desktop application.
Observed behavior: A banner or dialog repeatedly appears beneath the ribbon in Word asking the user to install or upgrade Microsoft Defender, causing annoyance and interrupting the user's workflow.

Before you start

Verify that your built-in Windows Security (formerly Windows Defender) is currently active and fully updated. This ensures your computer remains protected while you troubleshoot the repetitive Microsoft 365 prompts.

Solution 1Recommended

Acknowledge the Microsoft 365 Defender App Upgrade

The prompt typically refers to Microsoft Defender for Microsoft 365, a cross-device security dashboard, rather than the built-in Windows Defender.

Microsoft offers a separate application called 'Microsoft Defender' that is included with Microsoft 365 Personal and Family subscriptions. Word prompts you to install this because it acts as a centralized security dashboard for your devices, which is different from the built-in Windows Security.

If you simply dismiss the banner, it may return. Sometimes, completing the setup process or explicitly accepting the feature update is the only way to stop the prompt from reappearing.

Locate the Prompt

Open Microsoft Word and wait for the Microsoft Defender installation banner to appear beneath the ribbon.

Interact with the Banner

Click the 'Install', 'Learn More', or 'Get Started' button on the banner to view the Microsoft 365 Defender setup page.

Complete Setup or Dismiss

Follow the on-screen instructions to sign in with your Microsoft account and complete the setup. Alternatively, look for a 'Dismiss' or 'Remind me later' option within the prompt window if you prefer not to install the extra application.

Solution 2

Update Microsoft 365 Apps

Outdated Office applications might repeatedly show promotional banners or fail to register that a prompt was already dismissed.

Free Microsoft Office alternative

Try WPS Office to Avoid Unwanted Promotional Prompts

If you are tired of constant update banners and cross-product installation prompts in Microsoft Word, consider switching to WPS Office. It provides a clean, focused, and lightweight writing environment while maintaining strict compatibility with all your Microsoft Office documents.

1. Download the Installer: Visit the official WPS Office website and click the Free Download button.
2. Install WPS Office: Run the downloaded setup file and follow the quick installation wizard.
3. Open Your Documents: Launch WPS Writer and open your existing .docx files directly with full formatting support.

No forced installations of external security dashboard appsHighly compatible with Microsoft Word (.docx), Excel, and PowerPoint formatsLightweight installation that doesn't drain system resourcesFamiliar user interface for a seamless migration

Frequently Asked Questions

Is Microsoft Defender for Microsoft 365 the same as Windows Defender?

No. Windows Defender (now known as Windows Security) is the built-in antivirus software for Windows PCs. Microsoft Defender for Microsoft 365 is a separate, cross-device security dashboard application included with Microsoft 365 subscriptions to monitor phones, tablets, and computers from one place.

Will my computer be unprotected if I don't install the Defender app prompted by Word?

No. As long as your built-in Windows Security is active and updated, your Windows PC remains fully protected against malware and viruses even if you ignore or dismiss the Microsoft 365 Defender app prompt.

Can I permanently disable the Microsoft Defender banner in Word?

Microsoft does not currently provide a direct setting to permanently disable this specific promotional banner. Installing the app, ensuring your Office suite is fully updated, or consistently dismissing the prompt are the most common methods to stop it from reappearing.

Why is Microsoft Word advertising a security product?

The Microsoft Defender app is considered a benefit included in your Microsoft 365 subscription. Microsoft uses its core Office applications like Word and Excel to notify users about unused features or available upgrades within their subscription plan.

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