Update LexmarkPrinterInstall.ps1

LexmarkPrinterInstall.ps1

@@ -25,7 +25,7 @@ if ($ExactDriver) {
         $DriverName = $AnyLexmark.Name
         Write-Host "Exact match not found. Using installed fallback: '$DriverName'" -ForegroundColor Yellow
     } else {
-        # 3. No driver found; attempt to stage from INF
+        # 3. No driver found; prepare to stage from INF
         Write-Host "No Lexmark drivers found installed. Attempting to stage from INF..." -ForegroundColor Yellow
         if (-not (Test-Path -Path $FallbackInfPath)) {
             Write-Error "CRITICAL ERROR: No Lexmark driver is installed, and the staging file '$FallbackInfPath' was not found."
@@ -48,11 +48,17 @@ $PortName    = "IP_$IPAddress"
 
 Write-Host "Starting installation for '$PrinterName'..." -ForegroundColor Cyan
 
-# Register driver only if we detected it was missing and the INF exists
+# Register driver if missing
 if ($NeedsRegistration) {
-    Write-Host "Registering driver from INF: $DriverName..." -ForegroundColor Yellow
+    Write-Host "Staging driver package into Windows Driver Store..." -ForegroundColor Yellow
     try {
-        Add-PrinterDriver -Name $DriverName -InfPath $FallbackInfPath -ErrorAction Stop
+        # Use pnputil to stage the driver package. This is required for Windows to trust the INF.
+        $pnpOutput = pnputil.exe /add-driver $FallbackInfPath /install 2>&1
+        Write-Host "PnPUtil: $pnpOutput" -ForegroundColor Gray
+
+        Write-Host "Registering driver in print subsystem: $DriverName..." -ForegroundColor Yellow
+        # Registering using only the name now that the package is trusted in the store
+        Add-PrinterDriver -Name $DriverName -ErrorAction Stop
         Write-Host "Driver successfully registered." -ForegroundColor Green
     } catch {
         Write-Error "Failed to register driver: $_"