How to edit the system PATH variable in Windows registry

Using the control panel, you may be able to see only a little more than 2000 characters of the PATH variable. To edit it and add more paths to it, you can edit it in the Registry.

1. Run regedit.exe.
2. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment\Path
3. The Editor (right click on the key and select “Modify”) will allow you to use more characters.