
Fix Windows Defender Authentication Failed After Update
After a recent Windows update, you might see an error like "Authentication failed" when trying to...
Software troubleshooting desk

After a recent Windows update, you might see an error like "Authentication failed" when trying to...

You open Microsoft Store, try to download an app, and see a 502 Bad Gateway erro...

If you notice that Windows Security (formerly Windows Defender) is using a lot of memory—sometime...

If you see "Windows Security service stopped manually" in Event Viewer or your antivirus reports ...

If you open the Microsoft Store on Windows 11 and see nothing but a white or gray screen, the app...

You're browsing in Firefox or Edge without issue, but Chrome can't load any pages. This is a comm...