Boa tarde,
Já deu uma olhada nestes links abaixo?
http://answers.microsoft.com/en-us/windows/forum/windows_8-system/what-are-the-original-path-environment-variables/cbbd9221-4548-4f11-af7f-0ff8b3328e5d
http://social.technet.microsoft.com/Forums/windows/en-US/22a2ae01-1c2c-439c-bc13-76c9e0d7a255/windows-8-default-path-variables?forum=w8itprogeneral
Luiz Felipe S.T. Costa Esse contedo fornecido sem garantias de qualquer tipo, seja expressa ou implícita. TechNet Community Support
