Oracle: Could not find the main class

I try to install oracle instance client which is downloaded from the following link: http://www.oracle.com/technetwork/topics/dotnet/utilsoft-086879.html.

After downloading this file,
I just click the icon to install the software. Then, an error message is shown as below:

The problem is raised by downloading a corrupted file and the solution is just to download it again from oracle website in order to replace the corrupted file.