Installation Failed Exit Code 20 0 fatal errors, 0 errors, 0 warnings

I'm trying to Install Creative Suite 6 Design Standard on my pc. I've tried two or three times after re-starting the computer and closing all open applications as advised by the Installer.  I continue to get an "Installation Failed" window while the error summary reads:

Exit Code 20 0 fatal errors, 0 errors, 0 warnings

Anybody know how to handle this?

Thanks in advance for your help