Ok, thanks everybody for your posts, I choose win2k.
--------------------------------joke time

Source Code of Window$
#include \'win31.h\'
#include \'win95.h\'
#include \'evenmore.h\'
#include \'oldstuff.h\'
#include \'billrulz.h\'
#include \'monopoly.h\'
#define INSTALL = HARD
char make_prog_look_big[1600000];
void main()
{
set_video(card,historicVGA);
set_video(resolution,300*200);
set_video(max_colour,1);
system_colour(light_black,dark_black);
resources(system_memory=RAM/4);
resources(user_resources=((Pi*2)/9)*rand(0.9);
while(!CRASHED)
{
display_copyright_message();
display_bill_rules_message();
do_nothing_loop();
if (first_time_installation)
{
make_50_megabyte_swapfile();
do_nothing_loop();
totally_screw_up_HPFS_file_system();
search_and_destroy_the_rest_of_OS/2();
disable_Netscape();
disable_RealPlayer();
disable_Corel_Products();
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\');
if (system_ok())
crash(to_dos_prompt)
else
system_memory = open(\'a:\\swp0001.swp\', O_CREATE);
while(something)
{
sleep(5);
get_user_input();
sleep(5);
act_on_user_input();
sleep(5);
}
create_general_protection_fault();
}