This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.
Indication of Infection
This virus checks if the day is 15, if so, it will display a Chinese message box in the form of a question which translates to the following:
Today is 15th March, My Virus has occurred,
do you want format your hard disk?
If response is No, message box shows a message which translates to
I am very sorry, the computer has been infected with virus."
If response is Yes, message box shows a message which translates to
I admired your courage, Please go on.
The hard drive is not formatted if either response is selected.
Methods of Infection
This virus hooks the Word event handler of opening or creating documents in order to run its code.
Macro.Word97.Courage (AVP), W97M_COURAGE.A (Trend)