Fix Windows Defender Service Not Running - Teams 404 Error After Update: Quick Fixes-How to Fix Cloudflare 525 Timeout: SSL Handshake Failed

Updated 2026-06-18 17:37:46macos-help
Fix Windows Defender Service Not Running - Teams 404 Error After Update: Quick Fixes-How to Fix Cloudflare 525 Timeout: SSL Handshake 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.