License & Subscription Issues

Do You Lose Microsoft Defender After Canceling Microsoft 365?

Adam Davis Oct 1, 2026 868 views

Question details

The user wants to know if their device will remain protected by antivirus software after canceling a Microsoft 365 Personal or Family subscription, specifically regarding Microsoft Defender.

Do You Lose Microsoft Defender After Canceling Microsoft 365?

Product: Microsoft 365
Device & OS: Windows 10 / Windows 11
Scenario: Canceling a Microsoft 365 subscription and understanding the impact on device security and antivirus protection.
Observed behavior: The premium Microsoft Defender app features are deactivated, but the built-in Windows Security protections remain fully functional on the PC.

Before you start

Before canceling your Microsoft 365 subscription, verify that your PC is updated to the latest version of Windows 10 or Windows 11 to ensure the built-in security features are up to date.

Solution 1Recommended

Verify and Enable Built-in Windows Security

Use this solution to confirm that your basic antivirus and firewall protections remain active after your Microsoft 365 cancellation.

When you cancel your Microsoft 365 subscription, you lose access to the premium, cross-device Microsoft Defender app features, such as advanced identity theft monitoring and multi-device alerts.

However, your Windows PC will not be left unprotected. Windows 10 and Windows 11 include Windows Security built-in, which provides core standard antivirus, firewall, and anti-malware protections independently of any paid subscription.

Cancel your Microsoft 365 subscription

Navigate to your Microsoft account dashboard online, go to the 'Services & subscriptions' section, and proceed with canceling your Microsoft 365 plan.

Open Windows Security

Click the Start button on your Windows taskbar, type 'Windows Security' into the search bar, and click the app icon to open the security dashboard.

Check protection status

Look at the 'Virus & threat protection' and 'Firewall & network protection' modules. Ensure both have green checkmarks, indicating that your built-in basic security is actively protecting your system.

Verify and Enable Built-in Windows Security

Standalone App vs. Built-in Security: The 'Microsoft Defender' app in the Microsoft Store requires a Microsoft 365 Personal or Family subscription, whereas 'Windows Security' is always free and permanently built into Windows.

Free Microsoft Office alternative

Keep Editing Your Documents After Canceling Microsoft 365

Since you are canceling your Microsoft 365 subscription, you will lose the ability to edit files with Microsoft's desktop apps. WPS Office provides a free, lightweight, and highly compatible alternative so you can continue working on your documents, spreadsheets, and presentations seamlessly.

1. Download the software: Visit the official WPS Office website and download the free installation package for your Windows PC.
2. Install WPS Office: Run the downloaded installer and follow the quick on-screen instructions to set up the suite.
3. Open existing files: Launch WPS Office and directly open your existing .docx, .xlsx, or .pptx files to continue editing without a Microsoft 365 subscription.

Completely free to use with a familiar, easy-to-learn interface.Highly compatible with Microsoft Office formats including Word, Excel, and PowerPoint files.Lightweight software design that will not slow down your Windows PC.Includes a built-in PDF editor for viewing, editing, and converting PDFs.

microsoft office alternative - wps office

Frequently Asked Questions

Do I need to buy a third-party antivirus after canceling Microsoft 365?

Not necessarily. Windows 10 and Windows 11 already include Windows Security, which provides robust basic antivirus and anti-malware protection without requiring an additional subscription or third-party software.

Why does the Microsoft Store say Defender requires a subscription?

The Microsoft Store is referring specifically to the 'Microsoft Defender' cross-device dashboard app, which offers premium features across multiple devices. The essential 'Windows Security' app is a separate built-in system tool that remains entirely free.

Will my existing Microsoft Office files be deleted if I cancel my subscription?

No, your locally saved files remain safely on your hard drive. However, you will lose the ability to edit them using the premium Microsoft 365 desktop apps. You can use free alternatives like WPS Office to open and continue editing those files.

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