Here's what fixed this for me. I was using Chrome as my browser and I tried almost all of the tips I found on the forums to no avail. So I copied the URL from Chrome and opened it up in IE. Instead of getting a Flash movie installer, I got two links to the files. I downloaded both Air and the Inspiration Browser app (Air as an installer, IB as a .air file) and then ran the .exe and "opened" the .air which installed them on my Windows 7 machine. Hope this helps.
Alternatively you can also troubleshoot using the steps listed on this doc. Although this refers to an older version of Elements(7 actually) but can try the troubleshooting steps listed and let us know the results.
Moving this discussion to the Photoshop Elements forum.