Windows 10 default environment variables
VARIABLE
WINDOWS 10
%ALLUSERSPROFILE%
C:\ProgramData
%APPDATA%
C:\Users\{username}\AppData\Roaming
%COMMONPROGRAMFILES%
C:\Program Files\Common Files
%COMMONPROGRAMFILES(x86)%
C:\Program Files (x86)\Common Files
%CommonProgramW6432%
C:\Program Files\Common Files
%COMSPEC%
C:\Windows\System32\cmd.exe
%HOMEDRIVE%
C:\
%HOMEPATH%
C:\Users\{username}
%LOCALAPPDATA%
C:\Users\{username}\AppData\Local
%LOGONSERVER%
\\{domain_logon_server}
%PATH%
C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem
%PathExt%
.com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh;.msc
%PROGRAMDATA%
C:\ProgramData
%PROGRAMFILES%
C:\Program Files
%ProgramW6432%
C:\Program Files
%PROGRAMFILES(X86)%
C:\Program Files (x86)
%PROMPT%
$P$G
%SystemDrive%
C:
%SystemRoot%
C:\Windows
%TEMP%
C:\Users\{username}\AppData\Local\Temp
%TMP%
C:\Users\{username}\AppData\Local\Temp
%USERDOMAIN%
Userdomain associated with current user.
%USERDOMAIN_ROAMINGPROFILE%
Userdomain associated with roaming profile.
%USERNAME%
{username}
%USERPROFILE%
C:\Users\{username}
%WINDIR%
C:\Windows
%PUBLIC%
C:\Users\Public
%PSModulePath%
%SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\
%OneDrive%
C:\Users\{username}\OneDrive
%DriverData%
C:\Windows\System32\Drivers\DriverData
%CD%
Outputs current directory path. (Command Prompt.)
%CMDCMDLINE%
Outputs command line used to launch current Command Prompt session. (Command Prompt.)
%CMDEXTVERSION%
Outputs the number of current command processor extensions. (Command Prompt.)
%COMPUTERNAME%
Outputs the system name.
%DATE%
Outputs current date. (Command Prompt.)
%TIME%
Outputs time. (Command Prompt.)
%ERRORLEVEL%
Outputs the number of defining exit status of previous command. (Command Prompt.)
%PROCESSOR_IDENTIFIER%
Outputs processor identifier.
%PROCESSOR_LEVEL%
Outputs processor level.
%PROCESSOR_REVISION%
Outputs processor revision.
%NUMBER_OF_PROCESSORS%
Outputs the number of physical and virtual cores.
%RANDOM%
Outputs random number from 0 through 32767.
%OS%
Windows_NT
Although you can use environment variables to quickly access certain locations within Windows 10, you’ll typically use these variable when building an script or an application.
Keep in mind that some of the variables mentioned are not location specific, including %COMPUTERNAME%, %PATHEXT%, %PROMPT%, %USERDOMAIN%, %USERNAME%.
