The whole thing explains itself.
Wndows 99 is an abandoned version of Micrsoft Wndows. It was abandoned because the year 2000 was coming and they almost had Wndows 2000 done, so they worked on that. This is just a pretend backstory for this project. None of that was true. THIS VERSION CAN ONLY DO SIMPLE BIOS FUNCTIONS AND TURN ON OPEN AND CLOSE THE START MENU, POWER, AND REBOOT