Why Mathematica refuses to recognize my Intel C++ compiler? I addressed the compiler location, but when listing the C++ available, Mathematica never list the Intel C++ compiler. I have VS2012 and VS2013 both installed.

In[10]:= Needs["CCompilerDriver`"]
$CCompiler = {"Compiler" -> 
   CCompilerDriver`IntelCompiler`IntelCompiler, 
  "CompilerInstallation" -> 
   "C:\\Program Files (x86)\\Intel\\Composer XE 2013 SP1"}

Out[11]= {"Compiler" -> CCompilerDriver`IntelCompiler`IntelCompiler, 
 "CompilerInstallation" -> 
  "C:\\Program Files (x86)\\Intel\\Composer XE 2013 SP1"}

In[12]:= "Compiler" /. $CCompiler

Out[12]= CCompilerDriver`IntelCompiler`IntelCompiler

In[13]:= DownValues[CCompilerDriver`IntelCompiler`IntelCompiler]

Out[13]= {HoldPattern[
   CCompilerDriver`IntelCompiler`IntelCompiler["Available"]] :> 
  With[{CCompilerDriver`IntelCompilerWindows`Private`\
automaticInstallation = 
     CCompilerDriver`IntelCompilerWindows`Private`$ThisDriver[
       "ResolveInstallation"][Automatic]}, 
   TrueQ[CCompilerDriver`IntelCompilerWindows`Private`$ThisDriver[
      "ValidInstallationQ"][
     CCompilerDriver`IntelCompilerWindows`Private`\
automaticInstallation]]]}

In[14]:= CCompilers[]

Out[14]= {{"Name" -> "Visual Studio", 
  "Compiler" -> 
   CCompilerDriver`VisualStudioCompiler`VisualStudioCompiler, 
  "CompilerInstallation" -> 
   "C:\\Program Files (x86)\\Microsoft Visual Studio 12.0", 
  "CompilerName" -> Automatic}, {"Name" -> "Visual Studio", 
  "Compiler" -> 
   CCompilerDriver`VisualStudioCompiler`VisualStudioCompiler, 
  "CompilerInstallation" -> 
   "C:\\Program Files (x86)\\Microsoft Visual Studio 11.0", 
  "CompilerName" -> Automatic}, {"Name" -> "Visual Studio", 
  "Compiler" -> 
   CCompilerDriver`VisualStudioCompiler`VisualStudioCompiler, 
  "CompilerInstallation" -> 
   "C:\\Program Files (x86)\\Microsoft Visual Studio 10.0", 
  "CompilerName" -> Automatic}}