Hi Robert!
I use UltraHal with a Haptek character / avatar and it works just fine (with Windows 7).
What I have noticed and do not care for is the TIME LAG I experience if I choose to activate a .HTR or HAPTAR file using the command box. (Just double clicking on any .HTR file and the character shows in a small window).
To move the character around either larger / closer or farther / smaller or left / right will take some getting used to. There is a couple second delay after you move the mouse and the character moves to the new location. This is frustrating but since the character(s) are actually of secondary importance to me (Hal's brain operation / function / topic flow / grasp etc., being of primary importance), the character issue isn't really that annoying.
As mentioned, the character does seem to work fine within the confines of UltraHal.
I'm on a Windows 7, i700, 8 GB, 1 TB HD unit.
Hopefully the man behind the curtain at Haptek will come out with something soon (as he promised to do at the last Chatbot Conference this year). So, hang in there and keep checking.