O caminho agora é gerenciado pelo Windows 7 e não pelos arquivos autoexec.bat ou autoexec.nt. Para alterar as variáveis de ambiente do sistema, siga as etapas abaixo.
From the desktop, right-click My Computer and click Properties.
In the System Properties window, click on the Advanced tab.
In the Advanced section, click the Environment Variables button.
Finally, in the Environment Variables window (as shown below), highlight the Path variable in the Systems Variable section and click the Edit button. Add or modify the path lines with the paths you wish the computer to access. Each different directory is separated with a semicolon as shown below.
Esta é a configuração da variável de ambiente PATH padrão na nova instalação do Windows 7
% SystemRoot% \ system32;% SystemRoot%;% SystemRoot% \ System32 \ Wbem;% SYSTEMROOT% \ System32 \ WindowsPowerShell \ v1.0 \