http://www.sevenforums.com/tutorials/681-startup-repair.html As long as you can't boot into anything but safe mode it wouldn't hurt to run Malwarebytes on it too.
elephand is 101% correct it used in Kursk with that cammo pattern , it's a historical skinpack after all they did not paint all vehicles /tanks in the same pattern.
If your units are in cm, then that wheel is 20000 cm across, 20 km! Use the Rescale World Units utility and set it to .001 see if that fixes the problem.