Fix Windows installer native command handling

Author: mbv06

install-windows.ps1

@@ -69,6 +69,19 @@ function Write-SummaryLine {
     Write-Host " $Value"
 }
 
+function Format-ArgumentForProcess {
+    param(
+        [Parameter(Mandatory = $true)]
+        [string]$Value
+    )
+
+    if ($Value -notmatch '[\s"]') {
+        return $Value
+    }
+
+    return '"' + ($Value -replace '"', '\"') + '"'
+}
+
 function Format-CommandForDisplay {
     param(
         [Parameter(Mandatory = $true)]
@@ -105,20 +118,35 @@ function Invoke-NativeCommand {
 
     Write-Host ("Running: {0}" -f (Format-CommandForDisplay -FilePath $FilePath -Arguments $Arguments)) -ForegroundColor DarkGray
 
-    $hadNativePreference = Test-Path variable:PSNativeCommandUseErrorActionPreference
-    if ($hadNativePreference) {
-        $previousNativePreference = $PSNativeCommandUseErrorActionPreference
-        $PSNativeCommandUseErrorActionPreference = $false
-    }
+    $stdoutPath = [System.IO.Path]::GetTempFileName()
+    $stderrPath = [System.IO.Path]::GetTempFileName()
+    $argumentLine = (@($Arguments) | ForEach-Object { Format-ArgumentForProcess $_ }) -join ' '
 
     try {
-        $output = & $FilePath @Arguments 2>&1
-        $exitCode = $LASTEXITCODE
+        $process = Start-Process -FilePath $FilePath `
+                                 -ArgumentList $argumentLine `
+                                 -NoNewWindow `
+                                 -Wait `
+                                 -PassThru `
+                                 -RedirectStandardOutput $stdoutPath `
+                                 -RedirectStandardError $stderrPath
+
+        $stdout = if (Test-Path -LiteralPath $stdoutPath) {
+            @(Get-Content -LiteralPath $stdoutPath -ErrorAction SilentlyContinue)
+        } else {
+            @()
+        }
+        $stderr = if (Test-Path -LiteralPath $stderrPath) {
+            @(Get-Content -LiteralPath $stderrPath -ErrorAction SilentlyContinue)
+        } else {
+            @()
+        }
+
+        $output = @($stdout + $stderr)
+        $exitCode = $process.ExitCode
     }
     finally {
-        if ($hadNativePreference) {
-            $PSNativeCommandUseErrorActionPreference = $previousNativePreference
-        }
+        Remove-Item -LiteralPath $stdoutPath, $stderrPath -Force -ErrorAction SilentlyContinue
     }
 
     if ($output) {
@@ -221,7 +249,7 @@ Python $MinMajor.$MinMinor+ was not found.
 
 Install Python by running:
 
-  winget install Python.Python.3.14
+  winget install Python.Python.3.12
 
 Then open a new terminal window and run this installer again.
 "@