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NS_E_FLASH_PLAYBACK_NOT_ALLOWED
Read this as a state transition
NS_E_FLASH_PLAYBACK_NOT_ALLOWED (0xC00D10CF) is a failure result from Windows Media. It indicates Windows Media Player policy has disabled the legacy Flash playback path.
The result comes from the Player policy decision before attempting to instantiate or run Flash content. A representative case is the Player recognizes an SWF item but refuses it because Flash playback has been disabled.
Evidence to preserve
media extension and MIME type, Player policy, group policy or registry source, host version, and whether other media types play.
Record before the object changes
Test one hypothesis at a time
- Record and verify: media extension and MIME type, Player policy, group policy or registry source, host version, and whether other media types play.
- Run the controlled comparison: verify that supported audio or video works while the same policy consistently rejects SWF content.
Do not merge these HRESULTs
| HRESULT | Meaning in the standard description |
|---|---|
NS_E_IE_DISALLOWS_ACTIVEX_CONTROLS | Windows Media Player cannot play the file because your Internet security settings prohibit the use of ActiveX controls. |
NS_E_WMPOCXGRAPH_IE_DISALLOWS_ACTIVEX_CONTROLS | Windows Media Player cannot play the file because your Internet security settings prohibit the use of ActiveX controls. |
NS_E_WMPFLASH_INCOMPATIBLEVERSION | To play the selected item, you must install a later version of the Adobe Flash Player; To download the Adobe Flash Player, go to the Adobe website. |
Here, missing or incompatible Flash component results concern activation after policy allows the path.
Confirm the correction
For this occurrence, leave obsolete Flash playback disabled and migrate the content; use archival isolation rather than broad policy relaxation.
Authoritative references
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