Hi, Reese.
I looked into this a little further and found that the error is not so much with the installation as it was with the launching of VA at the end of the installation. If UAC is cranked up, the installer was not permitted to launch VA. I put some extra handling into the installer so that this shouldn't occur any more (you should just get the proper warning box before VA is actually launched). I don't know why the installer software doesn't have all this turned on by default, but that doesn't matter any more (at least for VA).
Thanks for the heads-up!