Crashes on start-up

[Richard]

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at SharpDX.DirectInput.DirectInput.EnumDevices(Int32 arg0, FunctionCallback arg1, IntPtr arg2, DeviceEnumerationFlags arg3) at SharpDX.DirectInput.DirectInput.GetDevices(DeviceType deviceType, DeviceEnumerationFlags deviceEnumFlags) at () at LaunchBox.GameControllerHandler.GetCurrentDevices() at BigBox.Data.OptionsListItem..ctor(String name, Action1 saveAction, Action1 loadAction, Func1 getValues) at () at BigBox.Data.OptionsPages.get_Controller() at BigBox.ViewModels.OptionsViewModel..ctor(MainViewModel mainViewModel) at BigBox.ViewModels.MainViewModel..ctor() --- End of inner exception stack trace --- at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.Activator.CreateInstance(Type type) at Caliburn.Micro.BootstrapperBase.DisplayRootViewFor(Type viewModelType, IDictionary2 settings) at (Bootstrapper , Object , StartupEventArgs ) at BigBox.Bootstrapper.OnStartup(Object sender, StartupEventArgs e) at System.Windows.Application.OnStartup(StartupEventArgs e) at System.Windows.Application.<.ctor>b__1_0(Object unused) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)