Dynamics AX 2012 R2 Installation failed

 I tried to install Dynamics AX 2012 R2 on a stand-alone configuration.  All pre-req were met.  However, after about 20 minutes the installation failed with following error.   I can't find anything in the event log other than this statement:

Installation of component "Trace Parser" failed. Review the log file "C:\Program Files\Microsoft Dynamics AX\60\Setup Logs\2013-02-17 22-09-27\DynamicsSetupLog.txt" for details.

Here is the relevant part in the DynamicsSetupLog.txt file.

2013-02-17 22:24:31Z Registering tracing manifest file "C:\Program Files\Microsoft Dynamics AX\60\Server\Common\TraceProviderCrimson.man".
2013-02-17 22:24:31Z WEvtUtil.exe install-manifest "C:\Users\TUser2\AppData\Local\Temp\tmp40EA.tmp"
2013-02-17 22:24:35Z  **** Warning: Publisher {8e410b1f-eb34-4417-be16-478a22c98916} is installed on
2013-02-17 22:24:35Z  the system. Only new values would be added. If you want to update previous
2013-02-17 22:24:35Z  settings, uninstall the manifest first.
2013-02-17 22:24:35Z  
2013-02-17 22:24:35Z  
2013-02-17 22:24:35Z Tracing manifest file has been registered successfully.
2013-02-17 22:24:35Z Component installation task completed successfully.
2013-02-17 22:24:35Z Waiting for the Application Object Server to start ...
2013-02-17 22:34:35Z ******************************************************************************************************

2013-02-17 22:34:35Z Component installation task stopped due to an error.

2013-02-17 22:34:35Z ******************************************************************************************************
2013-02-17 22:34:35Z ******************************************************************************************************

2013-02-17 22:34:35Z An error occurred changing the status of the service 'AOS60$01' to 'Running'. See the event log for more details.

2013-02-17 22:34:35Z ******************************************************************************************************
2013-02-17 22:34:36Z ******************************************************************************************************

2013-02-17 22:34:36Z Microsoft.Dynamics.Setup.AxSetupException: An error occurred changing the status of the service 'AOS60$01' to 'Running'. See the event log for more details.
2013-02-17 22:34:36Z    at Microsoft.Dynamics.Setup.Components.Aos.StartStopService(Boolean start, Boolean setErrorOnException, Boolean waitForFinish)
2013-02-17 22:34:36Z    at Microsoft.Dynamics.Setup.Support.SetupQueue.WaitForAOSIfNecessary(IEnumerable`1 componentsToCheck)
2013-02-17 22:34:36Z    at Microsoft.Dynamics.Setup.Support.SetupQueue.HelpServerInstaller.AosStatusHealthy()
2013-02-17 22:34:36Z    at Microsoft.Dynamics.Setup.Support.SetupQueue.HelpServerInstaller.HelpServerMsiInstall()
2013-02-17 22:34:36Z    at Microsoft.Dynamics.Setup.Support.SetupQueue.HelpServerInstaller.PerformWork()
2013-02-17 22:34:36Z    at Microsoft.Dynamics.Setup.Support.SetupQueue.InstallationClass.DoWork(Object sender, DoWorkEventArgs e)
2013-02-17 22:34:36Z    at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)

2013-02-17 22:34:36Z ******************************************************************************************************
2013-02-17 22:34:40Z S260FinishedInfo

Please let me know what is wrong. 

Thanks.