The fastest and simplest way to install Ubuntu on Windows is using the **Windows Subsystem for Linux (WSL)** with a single command.
WSL allows you to run a native Ubuntu command-line environment directly on Windows.

Here is the step-by-step process for installing Ubuntu using the simplified `wsl --install` command:

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## Step 1: Check Prerequisites and Open Terminal

1.  **Check Windows Version:** Ensure you're running a recent version of Windows 10 (version 2004, Build 19041 or higher) or Windows 11.
2.  **Open an Elevated Terminal:** Click the **Start** button, type `powershell` or `cmd`, right-click on the result (e.g., Windows Terminal, PowerShell, or Command Prompt),
and select **Run as administrator**.

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## Step 2: Run the WSL Installation Command

1.  **Execute the Installation:** In the administrator terminal, type the following command and press **Enter**:
    ``
    wsl --install
    ``
2.  **What this command does:**
      * Enables the required Windows optional features (**WSL** and **Virtual Machine Platform**).
      * Downloads and installs the latest **Linux kernel**.
      * Sets **WSL 2** as the default architecture.
      * Downloads and installs the **Ubuntu** distribution (this is the default Linux distribution).
3.  **Wait for Completion:** The process will download and install the necessary components. This may take a few minutes.
4.  **Restart:** When prompted to restart your computer to complete the installation, type `Y` or manually restart your machine.

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## Step 3: Complete Ubuntu Setup and Create a User

1.  **Launch Ubuntu:** After your computer restarts and you log back in, the Ubuntu installation window should **automatically open**.
If it doesn't, search for **Ubuntu** in your Windows Start Menu and launch the application.
2.  **Create a UNIX User Account:** The setup process will ask you to create a user account for your new Ubuntu instance.
      * **Enter new UNIX username:** Type a username (this can be different from your Windows username) and press Enter.
      * **New password:** Type a password and press Enter. *(Note: Nothing will appear on the screen as you type the password; this is normal for Linux terminals.)*
      * **Retype new password:** Retype the password to confirm.
3.  **Completion:** Once confirmed, the setup is complete, and you'll be dropped into the Ubuntu Bash shell. You are now logged in as the new user.

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## Step 4: Update the Ubuntu System (Recommended)

As a best practice, immediately update the software packages within your new Ubuntu environment:

1.  **Run the Update Command:** In the Ubuntu terminal, execute the following command:
    ``
    sudo apt update && sudo apt upgrade
    ``
      * You will be asked for the password you created in Step 3 to execute the `sudo` (superuser do) command.
2.  **Confirm Upgrade:** Type `Y` and press Enter when prompted to continue with the upgrade.

You can now use Ubuntu's command-line tools and environment directly within the Windows Subsystem for Linux.
To open it in the future, just launch the **Ubuntu** app from your Start Menu.