I believe the SU uninstall program may be ruined. If that's the case you won?t be clever to uninstall it through commonplace methods, but there is a workaround I have used productively many times along the last three years. Try this thing: 1.- Remove the whole SU folder. If you saved your models in the sameSU folder and want to keep them put them in a separate folder beforehand. 2.- Clean your registry form the residual SU files included the corrupted ones. For this you will nedd a good and safe registry cleaner.