Sub uncheck_all()
Dim sh As Shape
Application.ScreenUpdating = False
For Each sh In ActiveSheet.Shapes
If sh.Type = msoOLEControlObject Then
If TypeName(sh.OLEFormat.Object.Object) = "CheckBox" Then sh.OLEFormat.Object.Object = False
End If
If sh.Type = msoFormControl Then
If sh.FormControlType = xlCheckBox Then sh.OLEFormat.Object = False
End If
Next sh
Application.ScreenUpdating = True
End Sub