Environment variables

Please tell me the default environment variables list for inspiron 3520. I recently deleted (not deleted from the storage though) user variables PATH and set only one path named C:\Program Files\Java\jdk-20\

and for system variables path i set C:\Program Files\Java\jdk-20\bin; 

After doing this my edex-UI isnt running and in background it shows that its running successfully that clearly means that something is wrong in environment variables. Pls help me! My laptop is equipped with NVIDIA MX550 graphics card.