setx

Set persistent environment variables. More information: https://learn.microsoft.com/windows-server/administration/windows-commands/setx.

Set an environment variable for the current user:

setx {{variable}} {{value}}

Set an environment variable for the current machine:

setx {{variable}} {{value}} /M

Set an environment variable for a user on a remote machine:

setx /s {{hostname}} /u {{username}} /p {{password}} {{variable}} {{value}}

Set an environment variable from a registry key value:

setx {{variable}} /k {{registry\key\path}}