⚙️ Method 1: Using the GUI (System Properties)

1. Open System Properties

   • Press Win + R, type sysdm.cpl, and hit Enter.

2. Go to Environment Variables

   • In the “System Properties” window, click the Advanced tab, then hit the Environment Variables button at the bottom.

3. Create or Edit Variables

   • For a user variable, select your name under the top list.

   • For a system-wide variable, use the bottom list (requires admin rights).

   • Click New to create a variable, or Edit to modify an existing one.

4. Input Details

   • Set the Variable Name (e.g., MY_VAR) and Variable Value (e.g., C:\MyPath).

   • Click OK to save and close all dialogs.

💻 Method 2: Using the Command Line

✅ To set a variable for the current session:

set MY_VAR=C:\MyPath

🧱 To make it permanent (registry-based):

setx MY_VAR "C:\MyPath"

• setx writes to the registry, so the variable persists across sessions.

• Note: Changes from setx won't be visible in the current session—you'll need to restart your terminal.

🧪 Bonus: Check If It’s Set

• In Command Prompt:

echo %MY_VAR%

Or use SystemPropertiesAdvanced.exe to visually confirm from the GUI.

Want to script this via PowerShell or roll it into a batch operation? I can help craft something precise for you.