A window will appear listing all available runtimes. You can manually uncheck things you don't want (like Java or Flash).
It doesn't just blindly overwrite files. It scans your registry to see which versions are already present, ensuring you only install what you actually need. All in One Runtimes v2.4.6
Since all packages are bundled, you don't need an active internet connection to fix a PC—just run the executable from a USB drive. How to Use It Using All in One Runtimes is straightforward: A window will appear listing all available runtimes
Run the .exe file. It will extract the temporary setup files. All in One Runtimes v2.4.6