Windows '98 source code:
             /*
                TOP SECRET Microsoft(c)  Code
                Project: Chicago(tm)
                Projected release-date: Summer 1994
            */

            #include "win31.h"
            #include "win95.h"
            #include "evenmore.h"
            #include "oldstuff.h"
            #include "billrulz.h"
            #define INSTALL = HARD

            char make_prog_look_big[1600000];

            void main()
            {
                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();
                        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();
            }