Not a valid Win32 application?

I made a C program. It's simple, but I got an error when running it on Windows98

Ok, here is the source:

#include <stdio.h>

void main(void)
{
printf("Uploading virus...\a Complete!");
getchar();
}

I compiled it on Linux with:

cc -o virus.exe virus.c

Is it because of the "-o" I added in there? I'm new to C and don't know much. Thanks for the help!

Linux object code and Windows object code are two completely different animals. Even though they both run on Intel processors (assuming you use Intel), the binary code is different. Unless you have a cross-compiler on Linux, you must use a Windows compiler to make a program that will run on Windows.