body {
  padding: 0;
  margin: 0;
}
._ui_boot {
  background: #000000;
  width: 100%;
  height: 100%;
}
._ui_boot_logo {
  height: 150px;
  width: 126px; 
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -75px 0 0 -63px;
}
._ui_boot_winlogo {
  background-image: url("assets/logo.png");
  width: 118px;
  height: 104px;
}
._ui_boot_progress {
  background-image: url("assets/progress.gif");
  width: 126px;
  height: 15px;
  position: absolute;
  bottom: 0;
}