this whole setup shenanigans is really starting to irritate me...
To be honest, me too. But I am sorry for *your* problems.
What happens when you shut off UAC ? BUT :
I estimate this is about this small install ("Phasure OCX") and first you'd have to uninstall that (Software/Programs). If you now put XX in a new folder (!) and run XXHighEnd again (but UAC disabled !) for the first time, the install will go with uplevelled rights.
If this doesn't help, can you show me a picture of that "something not registered" error or decsribe it in full otherwise ?
Did you maybe disable services for Diagnostics ?
Sorry for your problems, but I guess it is all still for the better.
Peter