How to Edit and Delete Environment Variables in Windows

This guide shows how to manage environment variables in Windows, including how to edit, clear, and delete them.

Table of contents

Requirements

• Windows 7 or newer
• Administrative rights for some actions

What are Environment Variables?

Environment variables are key-value pairs that store configuration settings and can influence the behavior of software and operating systems.

In Windows, there are two types:

• System-Wide: These variables apply to all users and are typically to manage the operating system or shared applications.
• User-Specific: These variables are set per user and won’t impact other users on the same machine.

How to Edit Environment Variables

1. Open the Start Menu: Simply press the Windows key.
2. Search for Environment Variables: Type “Edit the system environment variables” and click on it.
3. Access Environment Variables: Click the “Environment Variables” button in the new window.
4. Edit or Add: You can either edit an existing variable or add a new one. Make your changes and click “OK”.

How to Delete Environment Variables

1. Follow Steps 1-3 from above: This will get you to the list of environment variables.
2. Select and Delete: Select the variable you wish to clear, and click the “Delete” button.

PowerShell Script for Automation

# Display current environment variables
Get-ChildItem Env:

# Remove a specific environment variable
[Environment]::SetEnvironmentVariable('VAR_NAME', $null, [EnvironmentVariableTarget]::User)

Caution

• System Stability: Be cautious when editing or deleting system-wide environment variables as it can affect system stability.
• Administrative Rights: You’ll need administrative rights to modify some system-wide variables.