The is a bundled installer that deploys necessary Visual C++ Redistributables and other Windows runtime libraries required by Unreal Engine 4.

| Error | Solution | | :--- | :--- | | | You are trying to run a 64-bit installer on 32-bit Windows. Upgrade to 64-bit or use the x86 version. | | Installation hangs at "VC++ Redist" | Uninstall older Visual C++ packages via Control Panel, then run the prerequisites again as Administrator. | | "Windows cannot find the specified file" | The direct download link is version-specific. Use Method 1 (extract from a game folder) instead. | | Antivirus flags the file | False positive. Epic Games’ prerequisites modify system redistributables. Add an exception or temporarily disable AV. |