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How can I display environment variables in PowerShell, and be able to distinguish between which ones are "user" vars and which ones are "system" vars?

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Not a powershell pro, but at worst, you could go fish around in the registry to see whether the vars you're interested in are showing up there. Inside a given session, I'm not really sure there's any distinction between user/sys vars other than the registry storage location...

Pertinent keys are:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment
HKEY_CURRENT_USER\Environment
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    Correct: in process there is no distinction. And of course PATH is a combination of system and user settings so as set is neither.
    – Richard
    Apr 6, 2011 at 8:06
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To find out within PowerShell:

Get-ItemProperty -Path 'Registry::HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment'

Get-ItemProperty -Path 'Registry::HKCU\Environment'
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Since PowerShell has access to the .NET Framework, you could use

[System.Environment]::GetEnvironmentVariables([System.EnvironmentVariableTarget]::Machine) [System.Environment]::GetEnvironmentVariables([System.EnvironmentVariableTarget]::Process) [System.Environment]::GetEnvironmentVariables([System.EnvironmentVariableTarget]::User)

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