$url = 'https://dl.google.com/tag/s/dl/chrome/install/beta/googlechromestandaloneenterprise.msi';

if ([Environment]::Is64BitProcess) {
    $url = 'https://dl.google.com/tag/s/dl/chrome/install/beta/googlechromestandaloneenterprise64.msi'
}

$app = Get-WmiObject -Class Win32_Product | Where-Object {
    $_.Name -eq "Google Chrome"
}
if ($app) {
    $app.Uninstall()
}

$wc = New-Object net.webclient
$msiInstaller = "$env:temp\google-chrome.msi"
Remove-Item $msiInstaller
$wc.Downloadfile($url, $msiInstaller)

$arguments = "/i `"$msiInstaller`" /quiet"
Start-Process msiexec.exe -ArgumentList $arguments -Wait