Got it to work :-) Thanks to another poster who was solving a different problem. Here's what worked for me: Copy the wizard installation files to a USB stick, then run the .exe file from the USB stick. Tried it and it worked on two computers.
OMG - that did it!!! I've been working on this all day for a client (with 12 units!) and couldn't get it to install. I thought I'd tried everything short of re-installing Windows on my laptop. Thank you sooooo much!
I'm sure all of this would have been solved if a CD was included with the package.