Hey! If you checked “Include an installer for prerequisites of packaged games”, UE4 will automatically include an installer which you can find under PackageFolder\WindowsNoEditor\Engine\Extras\Redist\en-us\UE4PrereqSetup_x64.exe. That will install needed prerequesites for UE4. For any DRM platform you could just let this .exe execute as a post-install step of your game Hope that helped!
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