This PowerShell script lets you install Winget on Windows editions (Mainly LTSC) without Microsoft Store prepackaged. To run this script, execute the following one-liner in PowerShell: "irm https://gist.githubusercontent.com/SandiyosDev/16ce2a887ac2935dc006f5979d98d206/raw/winget-installation-script.ps1/ | iex"

winget-installation-script.ps1

# This script automates the installation of Winget on Windows (Tested on Windows 10 IoT Enterprise LTSC 2021) and was last updated on 8/24/2023.
# It was designed according to the article: https://learn.microsoft.com/zh-tw/windows/iot/iot-enterprise/deployment/install-winget-windows-iot
# To run this script, execute the following one-liner in PowerShell:
# irm https://gist.githubusercontent.com/SandiyosDev/16ce2a887ac2935dc006f5979d98d206/raw/winget-installation-script.ps1/ | iex

# Greeting Message
Write-Host "Running script from https://gist.githubusercontent.com/SandiyosDev/16ce2a887ac2935dc006f5979d98d206/raw/winget-installation-script.ps1/ by SandiyosDev"

# Check if running as Administrator
if (-Not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
    Write-Host "Please run this script as an Administrator."
    pause
    exit
}

# Function to Download File
function DownloadFile {
    param (
        [string]$url,
        [string]$dest
    )
    $client = New-Object System.Net.WebClient
    try {
        $client.DownloadFile($url, $dest)
        if (Test-Path -Path $dest) {
            Write-Host "$dest downloaded successfully."
        }
        else {
            Write-Host "Failed to download $dest."
            pause
            exit
        }
    }
    catch {
        Write-Host ("An error occurred downloading " + $url + ": " + $_.Exception.Message)
        pause
        exit
    }
}

# Function to Detect Architecture
function DetectArchitecture {
    $architecture = (Get-CimInstance -ClassName Win32_Processor).AddressWidth
    $caption = (Get-CimInstance -ClassName Win32_Processor).Caption
    if ($architecture -eq 64) {
        if ($caption -like "*ARM64*") {
            return "ARM64"
        }
        else {
            return "x64"
        }
    }
    else {
        Write-Host "Unsupported architecture detected. The script supports only x64 and ARM64."
        pause
        exit
    }
}

# Main Code
$architecture = DetectArchitecture
Write-Host "Detected architecture: $architecture"

$tempDir = "$env:TEMP\WingetInstall"
New-Item -Path $tempDir -ItemType Directory -Force

# Define URLs based on the detected architecture
$VCLibsUrl = if ($architecture -eq "x64") { "https://aka.ms/Microsoft.VCLibs.x64.14.00.Desktop.appx" } else { "https://aka.ms/Microsoft.VCLibs.arm64.14.00.Desktop.appx" }
$wingetBundleUrl = "https://github.com/microsoft/winget-cli/releases/download/v1.7.11261/Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle"
$licenseUrl = "https://github.com/microsoft/winget-cli/releases/download/v1.7.11261/64b03c63cd5d4be8a28e8a271ff853cc_License1.xml"
$xamlUrl = "https://www.nuget.org/api/v2/package/Microsoft.UI.Xaml/2.7.0"

# Download the files
DownloadFile $VCLibsUrl "$tempDir\VCLibs.appx"
DownloadFile $wingetBundleUrl "$tempDir\Winget.msixbundle"
DownloadFile $licenseUrl "$tempDir\License1.xml"
DownloadFile $xamlUrl "$tempDir\Microsoft.UI.Xaml.2.7.0.zip"

# Expand the XAML zip
[System.Reflection.Assembly]::LoadWithPartialName('System.IO.Compression.FileSystem') | Out-Null
[System.IO.Compression.ZipFile]::ExtractToDirectory("$tempDir\Microsoft.UI.Xaml.2.7.0.zip", "$tempDir\Xaml")

# Installing components
Add-AppxPackage -Path "$tempDir\VCLibs.appx"
Add-AppxPackage -Path "$tempDir\Xaml\tools\AppX\$architecture\release\Microsoft.UI.XAML.2.7.appx"
Add-AppxPackage -Path "$tempDir\Winget.msixbundle"
Add-AppxProvisionedPackage -Online -PackagePath "$tempDir\Winget.msixbundle" -LicensePath "$tempDir\License1.xml"

# Cleaning up temporary files
Remove-Item -Path $tempDir -Recurse -Force

Write-Host "Installation complete. Testing 'winget' command..."
if (winget --version) {
    winget
} else {
    Write-Host "Winget installation failed. Please review the installation steps and try again."
    pause
    exit
}

# DISCLAIMER: This script is provided "as is" without warranty of any kind. Use it at your own risk.
# WARNING: Always review scripts from the internet before running them.