Widi stopped working after driver update

Hi,

I've got Lenovo Thinkpad 230t, Intel Core i7-3520M CPU and was using Widi with no problems until I updated the Widi software and the display drivers (Intel HD Graphics 4000). I am running Microsoft Windows 7 Home Premium

Following is the error log that Widi software reports when I start the application:

System.TypeInitializationException: The type initializer for 'System.Windows.Automation.Peers.AutomationPeer' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Automation.InvokePatternIdentifiers' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'UIAutomationCore.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

   at MS.Internal.Automation.UiaCoreTypesApi.RawUiaLookupId(AutomationIdType type, Guid& guid)

   at System.Windows.Automation.AutomationIdentifier.Register(AutomationIdType type, Guid guid, String programmaticName)

   at System.Windows.Automation.InvokePatternIdentifiers..cctor()

   --- End of inner exception stack trace ---

   at System.Windows.Automation.Peers.AutomationPeer.Initialize()

   at System.Windows.Automation.Peers.AutomationPeer..cctor()

   --- End of inner exception stack trace ---

   at System.Windows.Automation.Peers.AutomationPeer.RaiseFocusChangedEventHelper(IInputElement newFocus)

   at System.Windows.Input.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)

   at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)

   at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)

   at System.Windows.UIElement.Focus()

   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonDown(MouseButtonEventArgs e)

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

   at System.Windows.ContentElement.RaiseTrustedEvent(RoutedEventArgs args)

   at System.Windows.Input.InputManager.ProcessStagingArea()

   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)

   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)

   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)

   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)

   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)

   at System.Windows.Application.RunInternal(Window window)

   at WiDiApp.SingleInstanceManager.OnStartup(StartupEventArgs e)

   at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()

   at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)

   at WiDiApp.EntryPoint.Main(String[] args)

Can anyone please suggest a fix?

Thanks in advance