Dưới đây là Windows XP source code, cần phải biết sơ C language để hiểu...


/*
TOP SECRET Microsoft(c) Code
Project: XP(tm)
Projected release-date: Summer 2000
*/

#include "allwin31.h"
#include "allwin98.h"
#include "somewinnt.h"
#include "allrest.h"
#define INSTALL "3D HARD"

char make_prog_look_big[32000000];

void main()
{
while(!CRASHED)
{
display_copyright_message();
display_bill_rules_message();
do_nothing_loop();

if (first_time_installation())
{
make_128_megabyte_swapfile();
do_nothing_loop();
totally_screw_up_HPFS_file_system();
search_and_destroy_the_rest_of_OS/2();
hang_system();
}

write_something(anything);
display_copyright_message();
do_nothing_loop();
do_some_stuff();

if (still_not_crashed())
{
display_copyright_message();
do_nothing_loop();
basically_run_windows_3.1();
do_nothing_loop();
do_nothing_loop();
}
}

if (detect_cache())
{
disable_cache();
}

if (fast_cpu())
{
set_wait_states(lots);
set_mouse(speed, very_slow);
set_mouse(action, jumpy);
set_mouse(reaction, sometimes);
}

/* printf("Welcome to Windows 3.11"); */
/* printf("Welcome to Windows 95"); */
/* printf("Welcome to Windows 98"); */
printf("Welcome to Windows XP");

if (system_ok())
crash(to_dos_prompt);
else
system_memory = open("a:\swp0001.swp", O_CREATE);

while(1)
{
sleep(5);
get_user_input();
sleep(5);
act_on_user_input();
sleep(5);
}

create_general_protection_fault();
}