Exchange 2013 SP1 Install on W2K12R2 Pre-requisite fail

I am tryinig to install SP1 over CU3 for Exchange Server 2013 on Windows Server 2012 R2. During the Readiness Checks - Configuring Prerequisites it gets to 90% and then throws up the following error:

Error:

The following error was generated when "$error.Clear();

         $keyPath = "HKLM:\Software\Microsoft\WebManagement\Server";

         if (!(Get-Item $keyPath -ErrorAction SilentlyContinue))

         {

           New-Item $keyPath -Force

         }

         Set-ItemProperty -path $keyPath -name "EnableRemoteManagement" -value 0x1 -Type DWORD -Force;

         if (Get-Service WMSVC* | ?{$_.Name -eq 'WMSVC'})

         {

           Set-Service WMSVC -StartupType Automatic

           Stop-SetupService -ServiceName WMSVC;

           Start-SetupService -ServiceName WMSVC

         }

       " was run: "Service 'WMSVC' failed to reach status 'Running' on this server.".

I've tried rebooting the Exchange Server, but get the same message.

Any suggestions would be appreciated.