How to Reset DNS Cache for Windows Search Issues - How to Fix DNS Errors When Searching in Windows 10-How to Fix Windows Defender Real-Time Protection Authentication Failed

Updated 2026-06-13 16:55:49backup-recovery
How to Reset DNS Cache for Windows Search Issues - How to Fix DNS Errors When Searching in Windows 10-How to Fix Windows Defender Real-Time Protection Authentication Failed
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.