Two svchost.exe processes keeps occpying 25% (sum) CPU on Windows 10 Pro 1709

Question

I got a new Thinkpad T470 laptop, which is supposed to have "10+ hours of battery life". However, there are these two svchost.exe processes that keep taking a sizable bite on my CPU.

My guess for now is that: these two processes are started by the WiFi Hotspot "service".

Details of the two processes

Image Name                     PID Services
========================= ======== ============================================
    svchost.exe                   4144 BFE, CoreMessagingRegistrar, MpsSvc
    svchost.exe                  14108 SharedAccess

I used tasklist /SVC to elicit the above info, and used Process Explorer to monitor the CPU usage. What follows is a GIF on how persistent these two processes are (screen-recorded from Process Lasso, a paid piece of software).

Failed Attempts

Here goes a list of failed debugging attempts:

1. After spending a good hour with Microsoft Support people through a remote session, I was advised to conduct a "clean boot", by disabling all services. They also said I don't have to manually disable all startup processes/items in the Task Manager. It did not help:
   • Indeed, the Microsoft people's job is done after the "clean boot": s\he is no longe connected and I can no longer bother him or her; yet, what I get from the "clean boot" is nothing but a crappy solution:
     • For sure, these two processes are no longer bothering me, upon system start;
     • However, when I want to start the WiFi Hotspot, they are back again.
     • And, the WiFi Hotspot just gets stuck there: always in progress, and no other devices can connect to it.
2. Potentially, this may have to do with a third party software Connectify. Uninstalling it does not help: starting WiFi Hotspot through Windows Setting should no longer generate a usable WiFi, and the two svchost.exe process should still be running in the background, at all times.
3. I have tried to run Windows Updates, and Thinkpad Driver updates. It does not help. And, the system is Windows 10 Pro 1709.
4. I have also tried to manually stop the two services. Of course, this only helps with generating a "Blue Screen" and entails the BOIS to reload. (A system restart thereby follows.)

Question: does it cost 20% CPU to run WiFi Hotspot?

I need to generate a WiFi Hotspot for personal use, in my work environment. There is a piece of reading device that I literally "live on", which needs a home wifi to sync with the PC. Preferably, this "home wifi" ought to be running 24/7, through the WiFi Hotspot.

And, if it should not cost one 20% CPU to simply run a WiFi Hotspot, what should I do to debug this consistent CPU usage from the two aforementioned svchost.exe processes?

Question: how to resume WiFi Hotspot connectivity?

As answered in this post, one can disable all internet sharing services and get away with a lower CPU usage. Sure, this helps, but does not solve my issue: I would like to have a WiFi Hotspot running, at all times, with lower CPU usage. Disabling everything is not an equivalent to a satisfactory solution.

To whom that has closed this question, please enable the Answer button for me. I will provide more info on why this happened (tentatively a driver issue), and my tentative solution.