MMC snap-in error in eventvwr

I am trying to run eventvwr under Vista Home Premium Version 6.0.6002 Service
Pack 2 Build 6002. Eventvwr starts up and a pop up window shows that a
snap-in is being added to the console (although it does not say what the name
of the add-in is). Then eventvwr loads and I can see the overview and summary
listing.

When I go to the event viewer local panel (left side of screen) and expand
the Applications and services log, then click on MSFT office diagnostics, I
get an error:

"MMC has detected an error in a snap-in and is closing" It gives me two
options:

"report the error to MSFT then shut down MMC" and "Unload the snap-in and
continue running"

When I choose option 2 I get this error:

Unhandled exception in managed stack snap-in

FX:{b05566ad-fe9c-4363-be05-7a4cbb7cb510}

Exception has been thrown by the target of an invocation.

"System.Reflection.TargetInvocationException"

and this exception stack trace:

at
Microsoft.ManagementConsole.Internal.SnapInMessage PumpProxy.OnThreadException(Object sender, ThreadExceptionEventArgs e)
at
System.Windows.Forms.Application.ThreadContext.OnT hreadException(Exception t)
at System.Windows.Forms.Control.WndProcException(Exce ption e)
at
System.Windows.Forms.Control.ControlNativeWindow.O nThreadException(Exception
e)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.SendMessa ge(HandleRef hWnd,
Int32 msg, Int32 wParam, LVITEM& lParam)
at System.Windows.Forms.ListView.SetItemState(Int32 index, Int32 state,
Int32 mask)
at System.Windows.Forms.ListView.SelectedIndexCollect ion.Add(Int32
itemIndex)
at
Microsoft.Windows.ManagementUI.CombinedControls.UI ControlProcessing.SelectItemInListVirtual(ListView lv, Int32 index)
at
Microsoft.Windows.ManagementUI.CombinedControls.Ev entDetailControl.SelectEventItem(Int32 index)
at
Microsoft.Windows.ManagementUI.CombinedControls.Ev entDetailControl.InitializeEventListView(Boolean refresh)
at
Microsoft.Windows.ManagementUI.CombinedControls.Ev entDetailControl.InitializeResultView()
at
Microsoft.Windows.ManagementUI.CombinedControls.Ev entDetailControl.RefreshControls()
at
Microsoft.Windows.ManagementUI.CombinedControls.Ev entDetailControl.ExecuteRefreshAction()
at
Microsoft.Windows.ManagementUI.CombinedControls.Ev entDetailControl.OnAction(ManagementAction action)
at Microsoft.EventViewer.SnapIn.MMCEventsResultView.R efreshResults()
at Microsoft.EventViewer.SnapIn.MMCEventsResultView.O nShow()
at Microsoft.EventViewer.SnapIn.FormControlBase.OnFor mShow()
at Microsoft.EventViewer.SnapIn.FormViewEx.OnShow()
at Microsoft.ManagementConsole.View.ProcessNotificati on(Notification
notification)
at Microsoft.ManagementConsole.FormView.ProcessNotifi cation(Notification
notification)
at
Microsoft.ManagementConsole.ViewMessageClient.Proc essNotification(Notification notification)
at
Microsoft.ManagementConsole.Internal.IMessageClien t.ProcessNotification(Notification notification)
at
Microsoft.ManagementConsole.Executive.SnapInNotifi cationOperation.ProcessNotification()
at
Microsoft.ManagementConsole.Executive.Operation.On ThreadTransfer(SimpleOperationCallback callback)

When I click OK on the dialog box, I get a message "snap-in unavailable.
This snap-in performed a non-valid operation and has been unloaded. To
continue working with this snap-in, restart MMC or try loading the snap-in
again" followed by a repeat of the stack trace above.

Can anyone tell me how to fix this so I can use eventvwr?

Thanks
--
Steigenberger

--
Steigenberger