List of SYSTEM and USER Environment Variables

Windows has a default set of environment variables and their values. There are two types of environment variables: user environment variables (set for each user) and system environment variables (set for everyone). For example, the variable %USERNAME% represents the name of the currently logged-on user account.

If you have inadvertently removed one or more standard environment variables in Windows 10 or 11, the following table can help you manually re-add them.

Environment variables (System)

There are the default System variables.

Variable	Value
ComSpec	C:\WINDOWS\system32\cmd.exe
DriverData	C:\Windows\System32\Drivers\DriverData
NUMBER_OF_PROCESSORS
OS	Windows_NT
PATH	C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\WINDOWS\System32\OpenSSH\
PATHEXT	.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
PROCESSOR_ARCHITECTURE
PROCESSOR_IDENTIFIER
PROCESSOR_LEVEL
PROCESSOR_REVISION
PSModulePath	%ProgramFiles%\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
TEMP	C:\WINDOWS\TEMP
TMP	C:\WINDOWS\TEMP
USERNAME	SYSTEM
windir	C:\WINDOWS

Environment variables (User)

The following are the User variables.

Variable	Value
OneDrive	C:\Users\username\OneDrive
OneDriveConsumer	C:\Users\username\OneDrive
PATH	C:\Users\username\AppData\Local\Microsoft\WindowsApps;
TEMP	C:\Users\username\AppData\Local\Temp
TMP	C:\Users\username\AppData\Local\Temp

Note:

To open the Environment Variables dialog, launch sysdm.cpl, click “Advanced”, and click “Environment variables”.