Nada acontece quando clico para editar as variáveis de ambiente.
Unfortunately, the recent update to Windows 10 (November update, version 1511) destroyed this functionality. The "Change my environment variables" link no longer works. It is there, but it is dead.
So for the post-November version of Windows 10 the correct answer is: it is generally impossible to edit user-specific environment variables in version 1511 of Windows 10 from regular Users accounts.
Solução alternativa :
For the time being one workaround for non-administrative accounts is to:
- add your user account to Administrators group,
- logout,
- log back in,
- edit the variables using "System" -> “Advanced system settings” method, and then
- take away administrative rights again
Source Como defino as variáveis de ambiente do sistema no Windows 10? por AnT