The PMP ensures that decrypted, high-definition content never touches non-secure memory where a malicious process could read it. The path requires:

At first glance, 0xc03f6601 appears to be a standard NTSTATUS or HRESULT value. Microsoft uses the 0xc00d series for many media-related errors (e.g., 0xc00d36c4 for unsupported codec). However, 0xc03f6601 is less documented, indicating it belongs to a more specialized subsystem: or Protected Media Path (PMP) .

If you’ve ever sat through a Windows Autopilot deployment only to find your machine stubbornly stuck on the "Pro" version despite having a shiny new M365 E3 or E5 license, you’ve likely met our friend: .

If this is a clustered environment, check the cluster resources: