MSVC++2008 console program portability

Hello,
My console program won't run on anybody else's computer! I have a WIN32-configured C++ console program, built in release mode. What settings must I toy with to make the program run smoothly on any (newish) Windows system?
When I attempt to open it on my girlfriend's XP system, my father's Vista system, or seemingly any other, I am told that the application configuration is incorrect.

Thanks in advance.

MS doesn't ship the latest & greatest compiler's library files when distributing the OS, so you need to install the Visual Studio 2008 runtime library (search in MSDN) and it should be fine.

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Mats