How to configure Environment Variables
To work with the Wallet-Desktop, we need the Java SE Development Kit 8 (Java SDK 8). If you have a more recent version, you may encounter problems with the program "Smart Contracts." You can check this by typing "java -version"
When installing the node, you can freely select the Java installation point if it is not on the computer, or you can download it from the official site. Only after installation, you will need to add the path that Java installed to the Computer Environment Variables.
You need to go to My Computer -> System Properties -> Additional System Settings -> Environment Variables
In the item "Path", which is in the System Variables, the path is appended. (The default is C: \ Program Files \ Java \ jdk1.8. * _ *** \ bin)