Install Latest 7-Zip with PowerShell

# Modern websites require TLS 1.2
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
 
#requires -RunAsAdministrator
 
# Let's go directly to the website and see what it lists as the current version
$BaseUri = "https://www.7-zip.org/"
$BasePage = Invoke-WebRequest -Uri ( $BaseUri + 'download.html' ) -UseBasicParsing
# Determine bit-ness of O/S and download accordingly
if ( [System.Environment]::Is64BitOperatingSystem ) {
    # The most recent 'current' (non-beta/alpha) is listed at the top, so we only need the first.
    $ChildPath = $BasePage.Links | Where-Object { $_.href -like '*7z*-x64.msi' } | Select-Object -First 1 | Select-Object -ExpandProperty href
} else {
    # The most recent 'current' (non-beta/alpha) is listed at the top, so we only need the first.
    $ChildPath = $BasePage.Links | Where-Object { $_.href -like '*7z*.msi' } | Select-Object -First 1 | Select-Object -ExpandProperty href
}

# Let's build the required download link
$DownloadUrl = $BaseUri + $ChildPath

Write-Host "Downloading the latest 7-Zip to the temp folder"
Invoke-WebRequest -Uri $DownloadUrl -OutFile "$env:TEMP\$( Split-Path -Path $DownloadUrl -Leaf )" | Out-Null
Write-Host "Installing the latest 7-Zip"
Start-Process -FilePath "$env:SystemRoot\system32\msiexec.exe" -ArgumentList "/package", "$env:TEMP\$( Split-Path -Path $DownloadUrl -Leaf )", "/passive" -Wait