Running the installer as (right‑click → “Run as administrator”) ensures it has the necessary permissions to write to system folders and the Windows registry.
On the target machine, open a as administrator.
The installer is a runtime package from Epic Games that bundles essential components like DirectX and Visual C++ Redistributables required to run Unreal Engine 4 applications. ue4 prerequisites x64 setup exclusive
When you see the running, it is specifically skipping any x86 libraries. It checks the registry only under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x64 . If those aren't found with the exact file version, the setup fails and demands installation.
The is a bundled installer that includes essential software components—specifically Microsoft Visual C++ Redistributables and DirectX runtimes—needed to run games or applications built on Unreal Engine 4. If you are encountering an "exclusive" error or a failed installation, it typically means the installer is blocked by another process or cannot access a required component. Common Issues & Quick Fixes Running the installer as (right‑click → “Run as
UE4PrereqSetup_x64.exe /extract:"C:\temp\UE4Prereq"
UAC (User Account Control) does not automatically elevate. The exclusive installer requires high integrity level. Fix: Right-click → "Run as administrator" explicitly. Do not double-click. When you see the running, it is specifically
If you’ve tried all of the above and still see the error, check for components.
In your build automation (Jenkins, GitHub Actions, TeamCity), add a step that caches the exact UE4PrereqSetup_x64.exe from your engine version. Do not download fresh copies from the internet.
Despite its purpose, the UE4 Prerequisites x64 Setup fails often. Here are the top errors and solutions: