The USB 3.0 hub in this dock is from VIA (not DisplayLink) and there is a firmware update for this hub to help compatibility with Windows 8. It is called "Firmware Upgrade" and is available from here:
http://support.toshiba.com/support/m...eeText=3286829
It should update the VIA hub to version 9032. Note, this FW update is for the dynadock U3 only and should not be used on other VIA hubs on other products.
Wim