Check you are signed on as the computer administrator
Check that the speakers or headphones are switched on and working (otherwise the program will not launch)
Java: Mac OSX users: if you get a message (see below) "Unable to load Java Runtime Environment", this is caused where there is no, or an outdated version of Java on the computer. Wordshark/Numbershark needs Java to run; please download the latest release from www.java.com ...then install it. You may then need to re-start your browser (close all browser windows and re-open.)
No administrator option: if Wordshark/Numbershark has previously been installed on the computer, the option to become an administrator may not appear. Check for existing administrators under Users/List of administrators.