in reply to
How to get version number of any application installed on box
As I specified in Get version of installed OS, you could read the documetation for Config. You print the osversion and expect it to tell you the version number of Adobe Acrobat? At minimum make some effort to understand what the code you provide actually does. There's no way this module with that value will ever relate to anything other than the operating system. Consider searching the registry for the information you see. Win32::TieRegistry.
Update: fixed typo.