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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
I have a similar issue, where I've got to update a 1709 offline system. I've downloaded the MSU installers and tried installing with Windows Update Standalone Installer (fails with The update is not applicable to your computer, which is incorrect); DISM via (this method](https://superuser.com/a/1665169/857601) (seems to succeed, but never prompts for a reboot and the updates are not installed); also with DISM++, which gets the updates to "Staged" but never to "Installed" status.