Sometimes when a Dell USB-Ethernet adapter is added to a laptop it won’t work. This is due to a couple of setting in the Group Policy.

Firstly open your Group Policy Editor, (gpedit.msc).

Then go to:

Computer Configuration

Administrative Templates

System

Device Installation

Device Installation Restrictions

Set to ‘Not Configured’

‘Prevent installation of devices using drivers that match these device setup classes’ and ‘Prevent installation of devices that match any of these device IDs’