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Fix Windows Defender Threat Service Stopped Startup Type Error - Resolve Error 0xc004c003 When Offline-Windows Defender High CPU Usage Troubleshooting Guide

Updated 2026-06-13 14:56:42developer-tools
Fix Windows Defender Threat Service Stopped Startup Type Error - Resolve Error 0xc004c003 When Offline-Windows Defender High CPU Usage Troubleshooting Guide
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.

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