What does HRESULT 0xC00D11D2 (NS_E_WMP_ACCESS_DENIED) mean?

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Description:

Windows Media Player cannot access the file. The file might be in use, you might not have access to the computer where the file is stored, or your proxy settings might not be correct.%0

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NS_E_WMP_BAD_DRIVER	NS_E_WMP_LICENSE_RESTRICTS

NS_E_WMP_ACCESS_DENIED

Diagnosing NS_E_WMP_ACCESS_DENIED in the Windows Media Player playback path

NS_E_WMP_ACCESS_DENIED (0xC00D11D2) is returned when the Player was denied access to a file, share, server resource or proxy-protected object.

A successful comparison under a different account, share path, or proxy credential proves an authorization boundary rather than a codec or media-format problem. Re-test the identical resource after correcting only that boundary.

Controlled playback comparison

Capture the resource identity and resolved object, access token, ACL/share permissions, HTTP status, proxy challenge, sharing mode and impersonation state.
Verify that the caller uses the current Playlist, Media, Network, graph, device or DRM object instance.
Run the narrow experiment: open the exact resource under the same account through the same path and operation mode.
Do not combine this focused test with a codec-pack change, Player reset, or broad registry cleanup.
If the retest returns a different specific HRESULT, diagnose that new failure as the next stage.

Actions that obscure the cause

running permanently as administrator instead of correcting the narrow ACL or credential boundary.

Technical references

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