WUD allows you to download all of the current Windows Updates using a simple interface. All of the updates are contained in Update Lists (ULs) which allows you to choose which updates you want for which version of Windows. Once WUD has complete it's downloads, you simply integrate them into your Windows source using one of the many popular tools such as nLite.
As time goes on the Windows Updates Downloader continues to evolve. ULs are available for software other then Windows and automatic installation of updates is available on supported versions of Windows. WUD aims to help power users, tweakers and system administrators speed up their unattended installs, network deployments and automatic updates.