title: Including boost/asio.hpp throwing error
body: <p>When I use #include  in a header file, my program will no longer compile, giving the following error: <code>'boost::asio::basic_socket&lt;Protocol,StreamSocketService&gt;::cancel': By default, this function always fails with operation_not_supported when used on Windows XP, Windows Server 2003, or earlier. Consult documentation for details.</code></p>
  
  <p>I am also using websocketpp in this project, if that is relevant - however the error only occurs if I include  specifically in my header.</p>
  
  <p>I am using Windows 10, Visual Studio 14.</p>
  
  <p>I'm at a loss as to why this error is occuring. I do not have to use the library at all, simply include it.</p>