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Fix 'Windows Security Module Not Found' Antivirus Error - How to Resolve Windows 10 Activation Error 0x803fa067-Fix Windows Terminal 404 Not Found Error in VS Code

Updated 2026-06-13 15:45:36windows-fixes
Fix 'Windows Security Module Not Found' Antivirus Error - How to Resolve Windows 10 Activation Error 0x803fa067-Fix Windows Terminal 404 Not Found Error in VS Code
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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