After receiving a call from a user stating that their application is 'not working', which of the following is the MOST effective open-ended question to initially ask in order to gain a better understanding of the problem?
Are you connected to the internet, and is your network stable?
Do you receive an error message when you try to launch the application?
Have you tried reinstalling the application?
When did you last update the application?
Does the application freeze or crash at startup?
What specific issues are you experiencing with the application?