Variáveis - Windows

Sabe aquela dúvida %systemroot%? %systempath%? segue uma tabela para ajudar

Variable	Windows XP	Windows Vista/7
%ALLUSERSPROFILE%	C:\Documents and Settings\All Users	C:\ProgramData
%APPDATA%	C:\Documents and Settings\{username}\Application Data	C:\Users\{username}\AppData\Roaming
%COMPUTERNAME%	{computername}	{computername}
%COMMONPROGRAMFILES%	C:\Program Files\Common Files	C:\Program Files\Common Files
%COMMONPROGRAMFILES(x86)%	C:\Program Files (x86)\Common Files (only in 64-bit version)	C:\Program Files (x86)\Common Files (only in 64-bit version)
%COMSPEC%	C:\Windows\System32\cmd.exe	C:\Windows\System32\cmd.exe
%HOMEDRIVE%	C:	C:
%HOMEPATH%	\Documents and Settings\{username}	\Users\{username}
%LOCALAPPDATA%		C:\Users\{username}\AppData\Local
%LOGONSERVER%	\\{domain_logon_server}	\\{domain_logon_server}
%PATH%	C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;{plus program paths}	C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;{plus program paths}
%PATHEXT%	.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.WSF;.WSH	.com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh;.msc
%PROGRAMDATA%		%SystemDrive%\ProgramData
%PROGRAMFILES%	%SystemDrive%\Program Files	%SystemDrive%\Program Files
%PROGRAMFILES(X86)%	%SystemDrive%\Program Files (x86) (only in 64-bit version)	%SystemDrive%\Program Files (x86) (only in 64-bit version)
%PROMPT%	Code for current command prompt format. Code is usually $P$G	Code for current command prompt format. Code is usually $P$G
%PSModulePath%		%SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\
%PUBLIC%		%SystemDrive%\Users\Public
{Drive}:\$Recycle.Bin	C:\Recycle.Bin	C:\$Recycle.Bin
%SystemDrive%	C:	C:
%SystemRoot%	The Windows directory, usually C:\Windows, formerly C:\WINNT	%SystemDrive%\Windows
%TEMP% and %TMP%	%SystemDrive%\Documents and Settings\{username}\Local Settings\Temp	%SystemDrive%\Users\{username}\AppData\Local\Temp
%USERDOMAIN%	{userdomain}	{userdomain}
%USERNAME%	{username}	{username}
%USERPROFILE%	%SystemDrive%\Documents and Settings\{username}	%SystemDrive%\Users\{username}
%WINDIR%	%SystemDrive%\Windows	%SystemDrive%\Windows