Turn off the progress bar while downloading Chrome

Windows PowerShell re-renders progress on every buffer, so a 120 MB download
spends most of its time drawing a bar rather than transferring - minutes for
what should be seconds, and indistinguishable from a stall while you watch the
byte count crawl.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

scripts/enroll-chrome-management.ps1

@@ -94,8 +94,19 @@ if (-not $Remove -and -not (Find-Chrome)) {
     # are already elevated by this point, so this needs no second prompt.
     $msi = Join-Path $env:TEMP 'googlechromestandaloneenterprise64.msi'
     Write-Host 'Google Chrome is not installed — downloading it from Google (about 120 MB).'
+
+    # Progress off for the duration. Windows PowerShell re-renders the progress
+    # bar on every buffer, which on a 120 MB file costs far more time than the
+    # transfer itself — minutes instead of seconds, looking for all the world
+    # like a stalled download.
+    $previousProgress = $ProgressPreference
+    $ProgressPreference = 'SilentlyContinue'
+    try {
         Invoke-WebRequest -Uri 'https://dl.google.com/dl/chrome/install/googlechromestandaloneenterprise64.msi' `
                           -OutFile $msi -UseBasicParsing
+    } finally {
+        $ProgressPreference = $previousProgress
+    }
 
     Write-Host 'Installing Chrome...'
     $msiexec = Start-Process msiexec.exe -Wait -PassThru -ArgumentList @('/i', "`"$msi`"", '/qn', '/norestart')