env

• default Windows Environment Variables List

default Windows Environment Variables List

Variable	Default value assuming the system drive is C:
ALLUSERSPROFILE	C:\ProgramData
APPDATA	C:\Users\{username}\AppData\Roaming
ClientName	Terminal servers only - the ComputerName of a remote host.
CMDEXTVERSION	The current Command Processor Extensions version number. (NT = "1", Win2000+ = "2".)
CMDCMDLINE	The original command line that invoked the Command Processor.
CommonProgramFiles	C:\Program Files\Common Files
COMMONPROGRAMFILES(x86)	C:\Program Files (x86)\Common Files
COMPUTERNAME	{computername}
COMSPEC	C:\Windows\System32\cmd.exe or if running a 32 bit WOW - C:\Windows\SysWOW64\cmd.exe
ERRORLEVEL	The current ERRORLEVEL value, automatically set when a program exits.
HOMEDRIVE	C:
HOMEPATH	C:\Users\{username}
LOCALAPPDATA	C:\Users\{username}\AppData\Local
LOGONSERVER	\\{domain_logon_server}
NUMBER_OF_PROCESSORS	The Number of processors running on the machine.
OS	Operating system on the user's workstation.
System	C:\Windows\System32\;C:\Windows\;C:\Windows\System32\Wbem;{plus program paths}
ProgramData	C:\ProgramData
ProgramFiles	C:\Program Files or C:\Program Files (x86)
ProgramFiles(x86) 1	C:\Program Files (x86) (but only available when running under a 64 bit OS)
RANDOM	A random integer number, anything from 0 to 32,767 (inclusive).
%SessionName%	Terminal servers only - for a terminal server session, SessionName is a combination of the connection name, followed by #SessionNumber. For a console session, SessionName returns "Console".
SYSTEMDRIVE	C:
SYSTEMROOT	By default, Windows is installed to C:\Windows but there's no guarantee of that, Windows can be installed to a different folder, or a different drive letter.
TEMP and TMP	C:\Users\{Username}\AppData\Local\Temp; Under XP this was C:\{username}\Local Settings\Temp
TIME	The current time using same format as TIME.
USERPROFILE	%SystemDrive%\Users{username}. This is equivalent to the $HOME environment variable in Unix/Linux
WINDIR	%windir% is a regular User variable and can be changed, which makes it less robust than %SystemRoot%; Set by default as windir=%SystemRoot%