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.
Reply to the sender or other recipients. You can reply to only the sender of a message, or any combination of people who appear on the To and Cc lines. You can also add new recipients. On the Home or Message tab, in the Respond group, click Reply or Reply All.