SQL Agent After installation not able to start

SQL Server 2012 SQL Agent will not start after installation. Checked permissions, on surface configurations, all OK, have tried to run it as another account no Joy. The error i am receiving is the following :

The request failed or the service did not respond in a timely fashion. Consult the event log for applicable logs for details.

Event log tracked down with these details :

Faulting application SQLAGENT.EXE, version 2011.110.3128.0, time stamp 0x50de7939, faulting
module SQLSVC.dll, version 6.0.6002.18881, time stamp 0x51da3d16, exception code 0xc0000142, 
fault offset 0x00000000000b6fc8, process id 0xdb8, application start time 0x01d02a7019de72d7.

Bit more information i have gathered on the failure. Please note i have run already the command : EXEC SP_CONFIGURE 'Agent XPs'with

EXEC SP_CONFIGURE 'show advanced options',1
GO
RECONFIGURE
GO
EXEC SP_CONFIGURE 'show advanced options'

===================================

Unable to start service SQLSERVERAGENT on server WDBTEST1. (mscorlib)

Program Location:

Server stack trace:

 at Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.Service.Start()
 at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[]
 args, Object server, Object[]& outArgs)
 at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, 
 IMessageSink replySink)

Exception rethrown at [0]:

  at System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase)
  at System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData)
  at   
  Microsoft.SqlServer.Management.UI.VSIntegration.
  ObjectExplorer.ServiceActionHandler.EndInvoke(IAsyncResult result)
  at 
  Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.
  ServiceControlProgress.ActionCompletedHandler(IAsyncResult result)

===================================

Service Request Timeout (ObjectExplorer)

Program Location:

at

Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer
.Service.CheckServiceActionReturnValueS 
uccess(UInt32 returnValue)
at Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.Service.Start()