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Home / browser-issues / Fix OBS Black Screen with No Source Detected - Resolve Windows Defender Group Policy Block-Error 0x80073cf9 Windows Store: Step-by-Step Guide

Fix OBS Black Screen with No Source Detected - Resolve Windows Defender Group Policy Block-Error 0x80073cf9 Windows Store: Step-by-Step Guide

2026-06-13 13:46:44
Fix OBS Black Screen with No Source Detected - Resolve Windows Defender Group Policy Block-Error 0x80073cf9 Windows Store: Step-by-Step Guide

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.