Fix WSL1 install instructions

Author: luckytyphlosion

INSTALL.md

@@ -33,27 +33,23 @@ WSL1 is the preferred terminal to build **pokeemerald**. The following instructi
 - Otherwise, **open WSL** and go to [Choosing where to store pokeemerald (WSL1)](#Choosing-where-to-store-pokeemerald-WSL1).
 
 ### Installing WSL1
-1. Open [Windows Powershell **as Administrator**](https://i.imgur.com/QKmVbP9.png), and run the following command (Right Click or Shift+Insert is paste in the Powershell).
+1. Open [Windows Powershell **as Administrator**](https://i.imgur.com/QKmVbP9.png), and run the following commands (Right Click or Shift+Insert is paste in the Powershell).
 
     ```powershell
-    dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
+	wsl --install -d Ubuntu --enable-wsl1
     ```
 
 2. Once the process finishes, restart your machine.
 
-3. The next step is to choose and install a Linux distribution from the Microsoft Store. The following instructions will assume Ubuntu as the Linux distribution of choice.
-    <details>
-        <summary><i>Note for advanced users...</i></summary>
-
-    >   You can pick a preferred Linux distribution, but setup instructions may differ. Debian should work with the given instructions, but has not been tested.
-    </details>
+3. Open Windows Powershell **as Administrator** again (after restarting), and run the following command to configure Ubuntu to use WSL1.
 
-4. Open the [Microsoft Store Linux Selection](https://aka.ms/wslstore), click Ubuntu, then click Get, which will install the Ubuntu distribution.
+    ```powershell
+    wsl --set-version Ubuntu 1
+    ```
     <details>
-        <summary><i>Notes...</i></summary>
+        <summary><i>Note...</i></summary>
 
-    >   Note 1: If a dialog pops up asking for you to sign into a Microsoft Account, then just close the dialog.
-    >   Note 2: If the link does not work, then open the Microsoft Store manually, and search for the Ubuntu app (choose the one with no version number).
+    >   WSL may open automatically after restarting, but you can ignore it for now.
     </details>
 
 ### Setting up WSL1