Cheating quine, but self compiles itself.

quine-virus.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>

// this is all done by me, Chaidhat Chaimongkol
// reminiscent of mitosis

int SAFETY_OFFSET = 11; // filename is 11 characters long
int SAFETY_LIMIT = 3; // limit to a depth of
int MULTIPLY_BY = 2; // 2 for duplication

int main () {
    for (char i = 0; i < MULTIPLY_BY; i++)
    {
        // get filename
        char ch, filename[128], filetarget[128];
        strcpy(filename, __FILE__);

        // delete extension
        int j = 0;
        while (filename[j] != '.') {j++;}
        filename[j] = '\0';
        sprintf(filename, "%s%d", filename, i);

        // SAFETY DO NOT REMOVE
        if (j - SAFETY_OFFSET >= SAFETY_LIMIT)
            return 0;

        // get entire filename as target file
        sprintf(filetarget, "%s.c", filename);

        // read and copy the file to target file
        FILE *source = fopen(__FILE__, "r");
        FILE *target = fopen(filetarget, "w");
        while( ( ch = fgetc(source) ) != EOF )
          fputc(ch, target);

        // recompile the source code
        printf("Recompiling %s...\n", filename);
        printf("SAFETY CHECK %d < %d\n", j - SAFETY_OFFSET, SAFETY_LIMIT);
        char cmd[128];
        sprintf(cmd, "start cmd /c \"gcc %s.c -o %s && %s && pause", filename, filename, filename);
        printf("%s\n", cmd);
        system(cmd);
    }
}

start cmd /c \"gcc quine-virus.c -o quine-virus && quine-virus && pause
have MinGW and use command prompt

copies the source code, then recompiles the source code by itself.

This strapping young lad seems like he has a bright future.