Please help 2.8 how do you download the soft where f

I have a new 2.8 how do you download the soft where for it? I have windows Vista.
Thank you
Terry

Go here:
http://ardupilot.org/planner/docs/common-install-mission-planner.html
then download and install Missionplanner.
From there, follow the guidelines for the vehicle type at Ardupilot.org

It still don’t work. I am running Windows Vista. Any ideas?

Can you let me know what steps you get up to?
It’s important to follow the guide here:
http://ardupilot.org/copter/docs/initial-setup.html#initial-setup
If you do that, I can follow the same steps to try and help you get past the point where things get stuck.