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

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

You launch Windows Defender Security Center or try to run a scan, and you see a proxy error—somet...

You open Task Manager and see Windows Security (or Antimalware Service Executable) using 500 MB o...

If you see a 'Your connection is not private' warning or similar SSL errors in Chrome on Windows ...

You open OneDrive and see 'Sync service unavailable' with no files syncing. This usually means th...

If you see error code 0x8004de40 when trying to sync files in OneDrive, it usually means the sync...