A bit of detail about my setup:
Asus N56VZ laptop, with 16Gb RAM, two graphics cards (inbuilt Intel card and 4Gb Nvidia Geforce 650m), Win8 64.
The USB display adaptor running DisplayLink is an Asus HZ1 USB3.0 docking station.
The second monitor is a Wacom Cintiq 21" tablet/monitor. For some reason the female DVI socket on the Asus docking station differs lightly from the male DVI plug coming from the monitor so the monitor was plugged into the HDMI port via a DVI/HDMI adaptor.
The mouse (which shouldn't have anything to do with this, given that it hasn't been plugged into the docking station, but gets interrupted regardless) is a Logitech wireless M505.
I've downloaded the latest DisplayLink drivers and have installed/uninstalled them three times, with multiple restarts of the system. One thing that I have noticed is that when I install the software it at no point informs me that the software has been installed. After seeing the progress bars move quickly for a few seconds the dialogue window closed and... that was it. Nothing else. When I look at Windows task manager I can see some low level activity with the DisplayLink software running in the background and wait for that to stop before restarting the computer. Should there be some indication that the software has installed? If so, how long would it normally take? I have waited for very long periods of time on each install.
I've also checked out this page:
http://www.displaylink.org/forum/showthread.php?t=896
Unfortunately, although that link tells one what to look for, it doesn't provide information on what to do if the DisplayLink drivers do NOT show up in device manager (as they don't in my setup). They do show up when I call up the program list for uninstallation.
At this stage I've uninstalled the software and repackaged the docking station for shipping back to the supplier, unless someone comes up with a reasonable solution in the next while.
Edit: Had one last attempt at installing the software (x4, now). This time the software actually showed up in the system tray and my Cintiq stayed functional for a full 20 minutes (best effort yet) before going a bright violet/crimson mix and losing all functionality. Very pretty, if a bit disturbing. The mouse did its usual, froze, stuttered, froze, refused to respond to the Logitech software.
I have around 60 hours until the post office opens again on Monday, so I'll give it until then to see if any helpful responses show up here, after which it'll be shipped off for a refund.