Finally located the source of the bandwidth used by svchost. Appears to be a bug in Windows Update. I am running Windows 10, Home Edition. On my computer, Windows Update, almost every day, is downloading updates to programs NOT installed on my computer.
For example, just during the last week, it downloaded the following updates to these programs: Xbox, Facebook, Minecraft. None of these are installed on my computer. I confirmed what was being downloaded through the "Reliability Monitor". By the way, under
"Advanced Options" of Update settings, I do have the following option unchecked, "Give me updates for other Microsoft products when I update Windows".
I ran the following antivirus programs to confirm there is no virus on my computer: Avira, SUPER AntiSpyware, Malwarebytes, and Spybot. No viruses reported.
I do not see any mention of this bug in Microsoft's database. I have no solution to this bug.