A "virus" based on Konata from Lucky Star!
All this really does is rename your user and change your pfp and wallpaper.
your windows user + part of the message shown before you restart is your password! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .