fix: make downloads compatible with PS 5.1/7+

- PS1: conditional Invoke-WebRequest params (UseBasicParsing/TimeoutSec)
- BAT: robust download script using param detection for Invoke-WebRequest

Author: Pnwcomputers

SystemTester.bat

@@ -274,7 +274,7 @@ if /i not "%confirm%"=="Y" goto MENU
 
 echo.
 echo Downloading...
-powershell -NoProfile -ExecutionPolicy Bypass -Command "$ProgressPreference='SilentlyContinue'; try { [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; Invoke-WebRequest -Uri '%DOWNLOAD_URL%' -OutFile '%ZIP_FILE%' -TimeoutSec %DOWNLOAD_TIMEOUT_SEC%; Write-Host 'Download complete' -ForegroundColor Green } catch { Write-Host ('ERROR: ' + $_.Exception.Message) -ForegroundColor Red; exit 1 }"
+powershell -NoProfile -ExecutionPolicy Bypass -Command "$ProgressPreference='SilentlyContinue'; try { [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $iwc = Get-Command Invoke-WebRequest -ErrorAction SilentlyContinue; $p = @{ Uri = '%DOWNLOAD_URL%'; OutFile = '%ZIP_FILE%' }; if ($iwc -and $iwc.Parameters.ContainsKey('UseBasicParsing')) { $p.UseBasicParsing = $true }; if ($iwc -and $iwc.Parameters.ContainsKey('TimeoutSec')) { $p.TimeoutSec = %DOWNLOAD_TIMEOUT_SEC% }; Invoke-WebRequest @p; Write-Host 'Download complete' -ForegroundColor Green } catch { Write-Host ('ERROR: ' + $_.Exception.Message) -ForegroundColor Red; exit 1 }"
 
 if errorlevel 1 (
     echo.

SystemTester.ps1

@@ -537,7 +537,12 @@ function Test-NetworkSpeed {
         $tempFile = [System.IO.Path]::GetTempFileName()
         Write-Host "Running internet download test (~10MB)..." -ForegroundColor Yellow
         $stopwatch = [System.Diagnostics.Stopwatch]::StartNew()
-        Invoke-WebRequest -Uri $testUrl -OutFile $tempFile -UseBasicParsing -TimeoutSec 120 | Out-Null
+        # Use compatible parameters across PowerShell versions
+        $iwc = Get-Command Invoke-WebRequest -ErrorAction SilentlyContinue
+        $iwParams = @{ Uri = $testUrl; OutFile = $tempFile }
+        if ($iwc -and $iwc.Parameters.ContainsKey('UseBasicParsing')) { $iwParams.UseBasicParsing = $true }
+        if ($iwc -and $iwc.Parameters.ContainsKey('TimeoutSec')) { $iwParams.TimeoutSec = 120 }
+        Invoke-WebRequest @iwParams | Out-Null
         $stopwatch.Stop()
 
         $fileInfo = Get-Item $tempFile