The UE4PrereqSetup_x64.exe is a standard installer bundled with that ensures a Windows machine has all the necessary software libraries (redistributables) to run the engine or games built with it. 🛠️ Overview of UE4 Prerequisites (x64)
Do NOT use the UE4 prerequisites installer. Instead: Ue4 Prerequisites -x64- Setup
When it works, you will never notice it. When it fails, use the structured approach outlined above: Unreal Engine 4 The UE4PrereqSetup_x64