Error 0x800D0060

Value: -2146631584 | 0x800D0060 | 2148335712

What does it mean ?

NS_W_UNKNOWN_EVENT  
Unknown %1 event encountered.
Value: 96 | 0x0060 | 0b0000000001100000

Where does it come from ?

FACILITY_MEDIASERVER  
Windows Media Server
Value: 13 | 0x00D | 0b00001101

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