Hi greg-g,
Welcome to the HP Forums, I hope you enjoy your experience!
I see that you are having some problems with running the downloaded drivers for the printer.
I will be happy to help you.
I downloaded the driver on my Lab with Win 7 64 bit and the software opened and installed successfully.
Check the default programs to see how the file is opened with by default.
Go to start, control panel, default programs, select Set your default programs.
I would try another browser to see if it will work properly (Chrome, Firefox, Safari, Internet Explorer)
What web browser are you using?
What operating system are you using? How to Find the Windows Edition and Version on Your Computer.
Do you have your computer setup to open programs through specific software?
Thank you for posting on the HP Forums.
Have a nice day.