@source https://www.ninjaone.com/blog/how-to-view-and-manage-environment-variables

Common-environment-variables-in-Windows.md

Command variable	PowerShell variable	Description
%ALLUSERSPROFILE%	$env:ALLUSERSPROFILE	Shared app data across all users
%APPDATA%	$env:APPDATA	Roaming application data folder
%COMPUTERNAME%	$env:COMPUTERNAME	Hostname of the local machine
%OneDrive%	$env:OneDrive	OneDrive folder path (if OneDrive is installed)
%PATH%	$env:PATH	Executable search path for processes
%PROGRAMFILES%	$env:ProgramFiles	Default directory for 64-bit app installations
%SystemDrive%	$env:SystemDrive	Drive where Windows is installed
%SYSTEMROOT%	$env:SystemRoot	Path to Windows directory
%TEMP% or %TMP%	$env:TEMP or $env:TMP	Temporary file location
%USERNAME%	$env:USERNAME	Your Windows username
%USERPROFILE%	$env:USERPROFILE	Current user’s profile directory