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.
The HTTP Request and Response. The HTTP protocol can be likened to a conversation based on a series of questions and answers, which we refer to respectively as HTTP requests and HTTP responses. The contents of HTTP requests and responses are easy to read and understand, being near to plain English in their syntax.