Sign-in & Login Problems

Fix Microsoft Defender Repeated Sign-In Prompts After Restart

Aamir Naveed Akram Sep 30, 2026 869 views

Question details

The user is encountering repeated sign-in prompts from Microsoft Defender linking to aka.ms/sso-info whenever their computer restarts or wakes from sleep.

How to Stop Microsoft Defender from Asking for Sign-In After Restart

Product: Microsoft Defender
Device & OS: Windows
Scenario: Waking the computer from sleep mode or restarting the Windows operating system.
Observed behavior: Microsoft Defender displays a persistent authentication prompt related to recent Microsoft Single Sign-On (SSO) changes, which fails to resolve even after standard troubleshooting.

Before you start

Before troubleshooting, ensure you are connected to a stable internet network and have your primary Microsoft account email and password ready for re-authentication.

Solution 1Recommended

Update Windows and Reset the Microsoft Defender App

Installing the latest system updates and resetting the Defender app clears out conflicting single sign-on (SSO) caches and patches known Microsoft authentication bugs.

Since this behavior is heavily linked to recent changes in Microsoft's SSO services (particularly for European users), ensuring your system has the latest patches is the most reliable first step.

Check for Windows Updates

Click the Start button, select 'Settings', navigate to 'Windows Update', and click 'Check for updates'. Install any pending updates and restart your computer.

Open Installed Apps

Go to 'Settings' > 'Apps' > 'Installed apps' and scroll down until you locate 'Microsoft Defender' in the list.

Reset Microsoft Defender

Click the three dots next to Microsoft Defender, select 'Advanced options', scroll down to the Reset section, and click 'Reset'. Confirm the action.

Update Windows and Reset the Microsoft Defender App

App Reset: Resetting the app will not delete your personal files or compromise your computer's security; it merely clears the local app data to fix sign-in glitches.

Solution 2

Review Sign-In Options and Account Configurations

Incorrectly synced accounts or conflicts with third-party security software can trigger a loop in Microsoft Defender's authentication checks.

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Frequently Asked Questions

Why is Microsoft Defender redirecting me to aka.ms/sso-info?

This URL is linked to Microsoft's recent updates to their Single Sign-On (SSO) architecture. The prompt appears when your local Windows credentials fail to seamlessly handshake with Microsoft's updated cloud authentication servers.

Will reinstalling Microsoft Defender fix the sign-in loop?

If updating and resetting the app through the Windows Settings does not work, uninstalling and reinstalling Microsoft Defender from the Microsoft Store can often resolve deeper corruption issues causing the loop.

What should I do if the prompt continues after all troubleshooting steps?

If the issue persists, it may be a regional server-side bug related to Microsoft's SSO services. You should contact Microsoft Support directly, providing them with your device details and the troubleshooting steps you have already performed.

Login & Account Issues