Portable Update has been discontinued. Similar apps include WSUS Offline Update, which is free and open source. Other options are WHDownloader and WuInstall. In total there are three apps like Portable Update for Windows.
Using "WSUS Offline Update" (formerly known as "ct offline update" or "DIY Service Pack"), you can update any computer running Microsoft Windows safely, quickly and without an Internet connection.
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WHDownloader, formerly called the Windows Hotfix Downloader, is a lightweight and easy to use downloader used for finding and applying the latest Microsoft Windows updates.
WuInstall is a command line tool that makes it possible to install Windows Updates on demand. This gives you full control over the patching process. You decide what patches should be applied when and on which machine.
