You can add a new User Variable, System Variable, edit a Variable, etc. Learn how to use Environment Variable Editor in PowerToys in Windows 11.

Rapid Environment Editor is a powerful Environment Value or Variables Editor for Windows 11/10. Read review, download Rapid EE free. Portable available.

This environment variable lives on in Windows 10 as a way to tell the system where to look when you try to run a command. Normally, the system looks in the Windows folder and its System32 subfolder.