If you’re trying to download the Update for Universal C Runtime in Windows from this link: https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows, just know that you’re not going crazy and it’s not down temporarily. Those links are down for good. However, after a Google search, I found this post and a nice developer fixed or found the right download links for all operating systems including Windows Server 2012 NOT R2. Working link: https://discuss.pencil2d.org/t/cant-download-update-for-runtime/4025/13