Hello Jay,

It's hardly install this patch.
You can check linkage.
http://www.avsforum.com/avs-vb/showthread.php?p=10557909#post10557909
Or you can do below steps that support told me how to handle it.

1. Uninstall PDVD Ultra
2. Install Microsoft cleanup too and execute from "Start\all programs\WindowsInstaller Cleanup" To check if PDVD is on product list, If you can see PDVD in product list. Select PDVD and click "Remove" button to clean up PDVD.
Tool download link:
http://download.microsoft.com/download/e/9/d/e9d80355-7ab4-45b8-80e8-983a48d5e1bd/msicuu2.exe
3. Del the PDVD InstallShield folder. C:\Program Files\InstallShield Installation Information\{6811xxx-xxx}
4. Reboot PC.
5. Install PDVD Ultra 7.3 then apply 2911 patch.

It works great now. Thanks.