This app is intended as a joke. Are your friends still not used to Windows 8? Tell them that's no problem: you can use any Windows version you want on your device. Amaze your colleagues when you tell them you can use Windows 3.11 on your tablet or let Windows Millennium show a blue screen to have a good laugh. Or maybe you are just a little nostalgic like me and you like to see how it was back in the day. Just to be clear: This app doesn't have any real Windows functionality!