I figured out the solution...all I had to do was manually add the ".exe" extension to the filename, and I was able to run the installer. I'm surprised it worked...I really thought there was something wrong with the file.
That really should not happen; are you able to download other .exe files?
Yes, I've never had a problem before. I've even downloaded the Flash Player Install files from the Adobe distribution site on multiple occasions in the past without issue. The only thing I could think of is that perhaps the ".exe" extension was left off to avoid triggering security measures on a computer or private network that would prevent the download.
Anyway, it worked after I added the ".exe" extension to the filename, so I have no complaints!
Not sure what happened with the download, but the files posted all have the appropriate file extensions (exe, msi, dmg, etc).