Error getting the MachineGuid value from the Windows 7 registry

I'm trying the following code

class StreamGobbler extends Thread{
InputStream is;
String type;

StreamGobbler(InputStream is, String type){
    this.is = is;
    this.type = type;
}

public void run()
{
    try
    {
        InputStreamReader isr = new InputStreamReader(is);
        BufferedReader br = new BufferedReader(isr);
        String line=null;
        while ( (line = br.readLine()) != null)
            System.out.println(type + ">" + line);    
        } catch (IOException ioe)
          {
            ioe.printStackTrace();  
          }
       }
}

public class GoodWindowsExec{
public static void main(String args[])
{
    if (args.length < 1)
    {
        System.out.println("USAGE: java GoodWindowsExec <cmd>");
    }

    try
    {            
        String osName = System.getProperty("os.name" );
        String[] cmd = new String[3];
        if( osName.equals( "Windows 8" ) )
        {
            cmd[0] = "cmd.exe" ;
            cmd[1] = "/C";
            cmd[2] = "reg query HKLM\Software\Microsoft\Cryptography /v MachineGuid";
        }
        else if( osName.equals( "Windows 7" ) )
        {
            cmd[0] = "cmd.exe" ;
            cmd[1] = "/C";
            cmd[2] = "reg query HKLM\Software\Microsoft\Cryptography /v MachineGuid";
        }

        Runtime rt = Runtime.getRuntime();
        System.out.println("Execing " + cmd[0] + " " + cmd[1] + " " + cmd[2]);
        Process proc = rt.exec(cmd);
        // any error message?
        StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");            

        // any output?
        StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");

        // kick them off
        errorGobbler.start();
        outputGobbler.start();

        // any error???
        int exitVal = proc.waitFor();
        System.out.println("ExitValue: " + exitVal);        
    } catch (Throwable t)
      {
        t.printStackTrace();
      }
   }
   }

It has been tested on a computer with windows 8, it returns the value of MachineGuid, however on a computer with windows 7, when executing the .jar generated it returns me:

But when executing the code from Netbeans, it returns me: