Error 0x80070729

Value: -2147023063 | 0x80070729 | 2147944233

What does it mean ?

RPC_S_COOKIE_AUTH_FAILED  
HTTP proxy server rejected the connection because the cookie authentication failed.
Value: 1833 | 0x0729 | 0b0000011100101001

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

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