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Event ID: 305 Source: NSUNICAST

A network service provider returned an unexpected error.

<error description>
Error description: "OnSlowHeartbeat failed to listen on HTTP socket ErrorCode = 0xc00d0027" - Site will not start in IIS, so i stopped Windows Media Unicast Service (WMUS), started the site, and then restarted the WMUS. After that, the event disappeared.
Error description: "failed to Accept connection WSAError given 10038 ErrorCode= 0xc00d0027." The error occurred on Windows 2000 SP2 when Windows Media Unicast Service was running. When stopped, the error no longer appears in the event log. It appears to be Winsock Error WSAENOTSOCK (10038), "socket operation on non-socket."

Note: Windows Media Unicast Service is successfully serving Windows Media content even when errors are being produced.

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