Show Hidden Devices In Windows Device-Manager

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There is an environment-variable that if set,
it enables displaying more hidden/unavailble devices
in the Windows device-manager.

It can be very useful when trying to uninstall drivers.

You can set the environment-variable "on-the-fly",
following with launching the device-manager application:
Set devmgr_show_nonpresent_devices=1
mmc devmgmt.msc /s

Or add the devmgr_show_nonpresent_devices with value 1,
to your persistant environment-settings (where you have the system PATH defined..),
which is very useful.