: Lightweight virtualization features may use Umbus to isolate and manage virtual peripherals.
The shift toward user-mode drivers was a major security and stability milestone for Windows. umbus root bus enumerator
An "enumerator" is a piece of software responsible for detecting the devices connected to a bus and loading the appropriate drivers for them. The Plug and Play (PnP) Manager relies on enumerators to build the device tree. : Lightweight virtualization features may use Umbus to
From a driver stack perspective, the Umbus Root Bus Enumerator sits below the PnP Manager and above the actual function drivers for virtual devices (e.g., a virtual network adapter, synthetic mouse, or keyboard). a virtual network adapter
%SystemRoot%\System32\drivers\umbus.sys