Use Background Intelligent Transfer Service (BITS) to transfer files asynchronously between a client and a server. There are three types of transfer jobs. A download job downloads files to the client, an upload job uploads a file to the server, and an upload-reply job uploads a file to the server and receives a reply file from the server application.

via About BITS.

Caught a Microsoft BITS agent uploading some stuff to my laptop from google.com.  It seems Chrome related yet I don’t have Chrome installed.  Might need to track this down.