Widnows Environmental Variables

Variable	Windows Vista / 7
%COMPUTERNAME%	{computername}
%HOMEDRIVE%	C:\
%SYSTEMDRIVE%	C:\
%SYSTEMROOT%	C:\Windows
%WINDIR%	C:\Windows
%COMSPEC%	C:\Windows\System32\cmd.exe
%PROMPT%	Code for current command prompt format. Code is usually $P$G
%PATH%	C:\Windows\system32;C:\Windows;
%PATHEXT%	.com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh;.msc
%ALLUSERSPROFILE%	C:\ProgramData
%USERNAME%	{username}
%TEMP% and %TMP%	C:\Users\{username}\AppData\Local\Temp
%APPDATA%	C:\Users\{username}\AppData\Roaming
%HOMEPATH%	C:\Users\{username}
%USERPROFILE%	C:\Users\{username}
%PUBLIC%	C:\Users\Public
%PROGRAMFILES%	C:\Program Files
%PROGRAMFILES(X86)%	C:\Program Files (x86) (64-bit only)

Variable	Windows XP
%COMPUTERNAME%	{computername}
%HOMEDRIVE%	C:\
%SYSTEMDRIVE%	C:\
%SYSTEMROOT%	The Windows directory, usually C:\Windows, formerly C:\WINNT
%WINDIR%	C:\Windows
%COMSPEC%	C:\Windows\System32\cmd.exe
%PROMPT%	Code for current command prompt format. Code is usually $P$G
%PATH%	C:\Windows\System32\Wbem;{plus program paths}
%PATHEXT%	.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.WSF;.WSH
%ALLUSERSPROFILE%	C:\Documents and Settings\All Users
%USERNAME%	{username}
%TEMP% and %TMP%	C:\Documents and Settings\{username}\Local Settings\Temp
%APPDATA%	C:\Documents and Settings\{username}\Application Data
%HOMEPATH%	C:\Documents and Settings\{username}
%USERPROFILE%	C:\Documents and Settings\{username}
%PUBLIC%
%PROGRAMFILES%	C:\Program Files
%PROGRAMFILES(X86)%	C:\Program Files (x86) (64-bit version only)