Surface Laptop 1 keyboard and touchpad stopped working

This was absolutely my problem, and got me back up and working.  Thank you kind internet stranger.

About a week ago following a Windows update my keyboard and touchpad on the first gen Surface Laptop stopped working. Initially the 'surface hid mini driver' appeared to have failed and displayed "status_device_power_failure"

When I rolled back the update and uninstalled the 'surface hid mini driver' and restarted the keyboard started working again. However when new updates installed the same issue started again. Now when I rollback the updates and fix the 'surface hid mini driver' the keyboard still doesn't work.

At this point I have reinstalled all the updates, and the 'surface hid mini driver' seems to be stable and working properly but the keyboard still doesn't work.

Any advice?

I had the issue with my mom's laptop, and I had to diagnose it using TeamViewer 3000 kilometers away.

I noticed the same exclamation marks in the Devices manager, and I've tried running the Microsoft's Surface Diagnostic Tool with no effect (no wonder, those MS troubleshooting services are barely useful).

And I've tried what the other users here suggested with no effect.

The only thing that worked was restoring Windows 10 to a previous state through the System protection-System restore. Please note, that the last state might be broken, as in my mom's case it was today's (broken) state. So I picked a farther one just to be sure, like a week or two.

Is everyone on 1909, and using the latest (January 2020) surface update?

After that's installed, your HID mini driver version is 3.0.362.0

That driver, however, didn't solve the problem. Hard-powering it off, at least returns keyboard functionality.

I think the best temporary work-around is to disable foot boot in the power settings. That seems to resolve it. One option I did not try was unchecking the box on the driver settings that would prevent windows from controller power to the driver. By unchecking this, it isn't clear if the surface could fully enter "sleep" mode or not, but since the problem surface was that of a client of mine and not mine, I have no way of testing this.

First of all, this is a mess for Microsoft. Their solutions reported here are wrong and costly: buy a new laptop for a driver issue? Destroy your whole setup and reinstall everything? 

I fixed mine, and after trying so many things it is hard to tell which thing did it.

For me my trackpad came back first. Can't recall exact last step before that worked. 

Keyboard eventually came back, after uninstall "surface hid" driver AND all the keyboard drivers and then power button restart. 

It could of course also just be that each restart has a low chance of fixing it, so that after enough restarts it will fix itself. 

What a mess! MS should step up.

This is a much bigger issue than a restart!