Surface Laptop 1 keyboard and touchpad stopped working

Thank you for your advice. Now I can reply this comment by keyboard, not virtual.

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.

This issue is annoying. Yes, completely uninstalling HID device (make sure you check "remove hardware drivers") and holding power button solved the issue for now. Hopefully Microsoft will fix it with future update. I love my laptop.

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.

Please try and disconnect power source and hold power button for 30 seconds (it will force a restart and disconnect the battery for a short second). Worked for me a lot of other people here with the same problem. Hope it works for you too.