DirectX App only throws Exeption on other peoples machines

Question

Hi can anyone help me I'm in the later stages of completing a game made for www.remakes.org remakes competition. The game works fine on my machine but as soon as I try to run it on any other machine I get an error. "Common Runtime - Application has generated an exception that could not be Handled" I've ensured that I've installed the dotnet runtime and directX on the other machines, but as the message is so vague and it runs ok on my machine I have no idea why I'm having trouble. Yours Nick James