Npcap install hanging during driver install

A user reported that Npcap install was hanging at the "Installing NDIS driver" step. Installer logs showed it was stuck in the call to INetCfgClassSetup::Install. The SetupAPI.dev.log file ended just after "dvi: Committing changes to the network graph"

The user's reproduction steps:

1. Install Hyper-V Services (Control Panel > Programs and Features > Turn windows features on or off . Select Hyper-V and all sub-components)
2. Reboot (if not prompted)
3. Login and open Hyper-V Manager Console
4. Select Virtual Switch Manager
5. Add a new Virtual Switch...Connected to external network > select active Wifi Adapater > Allow management O/S to share the adapter (see attached screenshot)
6. Press ok
7. Reboot the device again
8. Login to Windows
9. Install NPCAP.

The only other non-Microsoft LWF was ZS_ZAPPRD, the Zscaler LightWeight Filter. We believe there is some corruption within Windows that is causing this hang, but we do not currently know how to diagnose further.

Start by reproducing the Hyper-V external virtual switch setup, then inspect the installer logs and SetupAPI.dev.log around INetCfgClassSetup::Install and “Committing changes to the network graph.” Done means isolating a reproducible cause of the hang or documenting the next confirmed diagnostic step.