function Invoke-WPFGetIso {
    <#
    .DESCRIPTION
    Function to get the path to Iso file for MicroWin, unpack that isom=, read basic information and populate the UI Options
    #>

    Write-Host "Invoking WPFGetIso"

    if($sync.ProcessRunning){
        $msg = "GetIso process is currently running."
        [System.Windows.MessageBox]::Show($msg, "Winutil", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Warning)
        return
    }

    Write-Host "         _                     __    __  _         "
	Write-Host "  /\/\  (_)  ___  _ __   ___  / / /\ \ \(_) _ __   "
	Write-Host " /    \ | | / __|| '__| / _ \ \ \/  \/ /| || '_ \  "
	Write-Host "/ /\/\ \| || (__ | |   | (_) | \  /\  / | || | | | "
	Write-Host "\/    \/|_| \___||_|    \___/   \/  \/  |_||_| |_| "

    $oscdImgFound = [bool] (Get-Command -ErrorAction Ignore -Type Application oscdimg)
    Write-Host "oscdimge.exe on system: $oscdImgFound"
    
    if (!$oscdImgFound) 
    {
        [System.Windows.MessageBox]::Show("oscdimge.exe is not found on the system, you need to download it first before running this function!")
        
        # the step below needs choco to download oscdimg
        $chocoFound = [bool] (Get-Command -ErrorAction Ignore -Type Application choco)
        Write-Host "choco on system: $oscdImgFound"
        if (!$chocoFound) 
        {
            [System.Windows.MessageBox]::Show("choco.exe is not found on the system, you need choco to download oscdimg.exe")
            return
        }

        Start-Process -Verb runas -FilePath powershell.exe -ArgumentList "choco install windows-adk-oscdimg"
        [System.Windows.MessageBox]::Show("oscdimg is installed, now close, reopen PowerShell terminal and re-launch winutil.ps1 !!!")
        return
    }

    [System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | Out-Null
    $openFileDialog = New-Object System.Windows.Forms.OpenFileDialog
    $openFileDialog.initialDirectory = $initialDirectory
    $openFileDialog.filter = "ISO files (*.iso)| *.iso"
    $openFileDialog.ShowDialog() | Out-Null
    $filePath = $openFileDialog.FileName

    if ([string]::IsNullOrEmpty($filePath))
    {
        Write-Host "No ISO is chosen"
        break
    }

    Write-Host "File path $($filePath)"
    if (-not (Test-Path -Path $filePath -PathType Leaf))
    {
        $msg = "File you've chosen doesn't exist"
        [System.Windows.MessageBox]::Show($msg, "Winutil", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Error)
        break
    }

    Write-Host "Mounting Iso. Please wait."
    $mountedISO = Mount-DiskImage -PassThru "$filePath"
    Write-Host "Done mounting Iso $mountedISO"
    $driveLetter = (Get-Volume -DiskImage $mountedISO).DriveLetter
    Write-Host "Iso mounted to '$driveLetter'"
    # storing off values in hidden fields for further steps
    # there is probably a better way of doing this, I don't have time to figure this out
    $sync.MicrowinIsoDrive.Text = $driveLetter

    Write-Host "Setting up mount dir and scratch dirs"
    $mountDir = "c:\microwin"
    $scratchDir = "c:\microwinscratch"
    $sync.MicrowinMountDir.Text = $mountDir
    $sync.MicrowinScratchDir.Text = $scratchDir
    Write-Host "Done setting up mount dir and scratch dirs"

    try {
        
        $data = @($driveLetter, $filePath)
        New-Item -ItemType Directory -Force -Path "$($mountDir)" | Out-Null
        New-Item -ItemType Directory -Force -Path "$($scratchDir)" | Out-Null
        Write-Host "Copying Windows image. This will take awhile, please don't use UI or cancel this step!"
        
        # xcopy we can verify files and also not copy files that already exist, but hard to measure
        # xcopy.exe /E /I /H /R /Y /J $DriveLetter":" $mountDir >$null
        $totalTime = Measure-Command { Copy-Files "$($driveLetter):" $mountDir -Recurse -Force }
        Write-Host "Copy complete! Total Time: $($totalTime.Minutes)m$($totalTime.Seconds)s"

        $wimFile = "$mountDir\sources\install.wim"
        Write-Host "Getting image information $wimFile"

        if (-not (Test-Path -Path $wimFile -PathType Leaf))
        {
            $msg = "install wim file doesn't exist in the image, are you sure you used Windows image??"
            [System.Windows.MessageBox]::Show($msg, "Winutil", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Error)
            throw
        }
        Get-WindowsImage -ImagePath $wimFile | ForEach-Object {
            $imageIdx = $_.ImageIndex
            $imageName = $_.ImageName
            $sync.MicrowinWindowsFlavors.Items.Add("$imageIdx : $imageName")
        }
        $sync.MicrowinWindowsFlavors.SelectedIndex = 0
        Get-Volume $driveLetter | Get-DiskImage | Dismount-DiskImage
        Write-Host "Selected value '$($sync.MicrowinWindowsFlavors.SelectedValue)'....."

        $sync.MicrowinOptionsPanel.Visibility = 'Visible'
    } catch {
        Write-Host "Dismounting bad image..."
        Get-Volume $driveLetter | Get-DiskImage | Dismount-DiskImage
        Remove-Item -Recurse -Force "$($scratchDir)"
        Remove-Item -Recurse -Force "$($mountDir)"
    }

    Write-Host "Done reading and unpacking ISO"
    Write-Host ""
    Write-Host "*********************************"
    Write-Host "Check the UI for further steps!!!"

    $sync.ProcessRunning = $false
}