Re: u pux host
There is a lot of information out there about unpuxhost, see: https://duckduckgo.com/?q=unpuxhost&t=hu&atb=v33-7__&ia=web
None of it is particularly clear about its actual purpose but it is something from Microsoft and it's widely agreed it's safe, but not essential. I stopped reading after finding the same basic information in multiple sources and none that looked any more promising with details.
Brian - Windows 10 Home, 64-Bit, Version 1703, Build 15063 (dot level on request - it changes too often to keep in signature)