On my Surface Pro 3 running W10x64pro (upgraded from W8.1) I just now got a dialog pop up that Windows firewall has blocked some features of C:\Windows\System32\wuapihost.exe. The dialog wants me to allow (or cancel) wuapihost on public networks (this option is checked) and not on private networks (this option is unchecked). I have no idea what this is. I searched this forum but only one non-relevant thread came up. So... anyone have any ideas what this is about and what my best option is?

BTW, the network I'm on is my local private home network, no other wireless networks are in the vicinity.