I download mango and jdk , install jdk first, then unzip mango file
Then I ran "ma-start" as instructed and this is what I got:

C:\Utilidades\free-m2m2-core-3.7.7\bin>ma-start
Using C:\Utilidades\free-m2m2-core-3.7.7 as MA_HOME
C:\Utilidades\free-m2m2-core-3.7.7\overrides\classes;C:\Utilidades\free-m2m2-core-3.7.7\classes;C:\Utilidades\free-m2m2-core-3.7.7\overrides\properties;C:\Utilidades\free-m2m2-core-3.7.7\overrides\lib*;C:\Utilidades\free-m2m2-core-3.7.7\lib*
Using Java at java
'"java"' is not recognized as an internal or external command,
operable program or batch file.

Then i run path just to verify and got this:

C:\Utilidades\free-m2m2-core-3.7.7\bin>path
PATH=C:\Program Files (x86)\Rockwell Software\RSCommon;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Common Files\Rockwell;C:\Program Files (x86)\Rockwell Software\RSCommon;C:\Program Files (x86)\Rockwell Automation\Common\Components;C:\Program Files (x86)\Rockwell Software\RSView Enterprise;C:\WINDOWS\System32\OpenSSH;C:\Users\GRACETALES\AppData\Local\Microsoft\WindowsApps;

Please let me know what i did wrong.