UAC3556B device driver fails to install

When installing a modem using the NTL Studio TCA drivers, if for some reason the UAC3556B drivers do not install automatically, update them manually. Instead of pointing the explorer window to c:\Program Files\NTL Studio\TCA Drivers, instead choose the C:\ drive and include all subfolders. The driver for UAC3556B is a windows driver, and should install if it searches the whole hard drive for them.

If the drivers still do not install after searching the C:\ drive turn off the TCA modem, wait 20 seconds and then power the device on once again.