Please try to uninstall and reinstall. There was a bad version that won't update automatically and causes a crash. If you continue to have the issue please repost.
Trying to extract the downloaded zip using the default windows extractor yields an error that the compressed folder is invalid or corrupted.
When I use 7-zip I can get at the file, but it doesn't have an extension and putting a ".exe" and running it opens a command prompt that immediately closes. This is with the previous version gone.
I also retried the IE install, to no avail.