
Fix Windows Defender Sync Issues with Microsoft 365
When Windows Defender fails to sync with Microsoft 365, you might see alerts like "Can't connect ...
Software troubleshooting desk

When Windows Defender fails to sync with Microsoft 365, you might see alerts like "Can't connect ...

You open Windows Security and see a 404 Not Found error, or the app won't load at all. Often this...

If Microsoft Teams shows a network error or sync issue, you may see messages like "We're having t...

If your PC takes longer to start up than it used to, Windows Defender might be scanning too aggre...

If Chrome is using excessive memory and then stops working—freezing, crashing, or becoming unresp...

You're working in OneDrive and suddenly get a message that your token has expired. Files stop syn...