function Invoke-WPFInstall {
    <#
    .SYNOPSIS
        Installs the selected programs using winget, if one or more of the selected programs are already installed on the system, winget will try and perform an upgrade if there's a newer version to install.
    #>

    $PackagesToInstall = $sync.selectedApps | Foreach-Object { $sync.configs.applicationsHashtable.$_ }


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

    if ($PackagesToInstall.Count -eq 0) {
        $WarningMsg = "Please select the program(s) to install or upgrade."
        [System.Windows.MessageBox]::Show($WarningMsg, $AppTitle, [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Warning)
        return
    }

    $ManagerPreference = $sync.preferences.packagemanager

    $handle = Invoke-WPFRunspace -ParameterList @(("PackagesToInstall", $PackagesToInstall),("ManagerPreference", $ManagerPreference)) -ScriptBlock {
        param($PackagesToInstall, $ManagerPreference)

        $packagesSorted = Get-WinUtilSelectedPackages -PackageList $PackagesToInstall -Preference $ManagerPreference

        $packagesWinget = $packagesSorted[[PackageManagers]::Winget]
        $packagesChoco = $packagesSorted[[PackageManagers]::Choco]

        try {
            $sync.ProcessRunning = $true
            if($packagesWinget.Count -gt 0 -and $packagesWinget -ne "0") {
                Show-WPFInstallAppBusy -text "Installing apps..."
                Install-WinUtilWinget
                Install-WinUtilProgramWinget -Action Install -Programs $packagesWinget
            }
            if($packagesChoco.Count -gt 0) {
                Install-WinUtilChoco
                Install-WinUtilProgramChoco -Action Install -Programs $packagesChoco
            }
            Hide-WPFInstallAppBusy
            Write-Host "==========================================="
            Write-Host "--      Installs have finished          ---"
            Write-Host "==========================================="
            Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -state "None" -overlay "checkmark" }
        } catch {
            Write-Host "==========================================="
            Write-Host "Error: $_"
            Write-Host "==========================================="
            Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -state "Error" -overlay "warning" }
        }
        $sync.ProcessRunning = $False
    }
}