If you want to integrate Windows Updates, you need to choose (in the system tab) the correct folder path where you download all updates in the Updates field.
So, you could do like this : - Use the "Updates Downloader" tool to download all necessary updates - Then, in WinReducer "System" tab choose the correct folder path (it will be choosen automatically by default, so open the folder window choice and hit OK to display the correct folder path in the Updates field) - And "Apply" your changes
OK, that's what I've done. Because of this, I've assumed VC++ would have also been installed as well (being collected as "update"). I'll include all these runtimes in a post-installation script, then. Thank you!