Multitech MultiModem ZBA MT9234ZBA-USB-CDC User Manual page 16

You may be prompted by the Windows Logo check. It is safe to continue (select to Continue Anyway) as the installation
7.
file has passed certification testing for Windows Vista (all other operating systems may display a certification warning).
The Please wait while the wizard installs the software wizard pane appears.
8.
MT9234ZBA-USB User Guide
Chapter 2 – Installing the Modem
16