I keep seeing Bing in my optional updates. It gives a little information but I'm still confused. Bing Desktop sets the daily Bing photo as the desktop background and adds a floating search bar. It DOES change the background daily.. Windows 10 Pro - Start10 - part of a local network which is a '3rd party optimizer-free' zone..
2.2.4 HTTP OPTIONS Response. After receiving an HTTP OPTIONS request, a server responds with an HTTP OPTIONS response that specifies the protocol versions it supports.
HTTP Response Headers. The following list contains valid HTTP response headers. Use these headers to provide information about your HTML document in a meta tag, or to gather information about another document using HttpQueryInfo and QueryInfo. Acceptable media types. Acceptable character sets.