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Yes, it's better to see next week if and what MS changes... Because the prerequisite (KB4019990) seems to be necessary only if you use directly the NET-FW_MS-Installer ! If you use one of the repacks (Sereby, abbodi1406, Ricktendo) you don't get the error like with the MS-Installer (binding to D3DCompiler_47.dll). This library is already present on the most systems in the related program-directories, because it's used by Firefox (& derivated), Thunderbird, AcrobatReader, IE, but just not in C:\Windows\System32, where the MS-Installer is looking for..... Even if Version 4.7 is already installed by one of the repacks and you start the MS-Installer, you still get the described error! KB4019990 writes the library under C:\Windows\System32.