Your DisplayLink driver is unsigned. It won't work with 64bit Windows OS. I suggest fixing that if you want people to buy your product.
Our drivers are signed. If you use Windows 7, update with Microsoft security patches to verify Microsoft digital signature successfully.
I should probably also mention the workstation is Windows 7 64bit
I downloaded the latest drivers (DisplayLink USB Graphics Software for Windows 8.4 M0.exe) you have on your site for Dynadock. I'm deploying with SCCM so need to open this up as it won't install quietly. One of the drivers in there (dlidusbx64) reports as unsigned. The workstation I am deploying to is completely up to date with MS updates.