Reboot and try the UE4 Prerequisites again.
To ensure a smooth UE4 experience, consider the following additional setup and configurations:
Navigate to your Epic Games or game installation folder. The default path for the launcher is usually: C:\Program Files (x86)\Epic Games\Launcher\Engine\Extras\Redist\en-US\ (For standalone games, check the _CommonRedist or Engine\Extras\Redist folder inside the game's directory). Find the file named UE4PrereqSetup_x64.exe . Right-click the file and choose .
The word "exclusive" in Windows installation terms usually means the installer requires sole access to system resources. It cannot run concurrently with other installations, or it detects that a previous version is firmly locked in the system registry. The main causes include:
Open your third-party antivirus dashboard (e.g., Avast, Bitdefender, Malwarebytes). Temporarily disable for 10 minutes. Try running the UE4PrereqSetup_x64.exe again. ue4 prerequisites x64 setup exclusive
: This is a critical, often skipped step that finalizes the registry changes. Unreal Engine Common Troubleshooting and Fixes Error Prerequisites x64 - Epic Developer Community Forums
msiexec /unregister msiexec /regserver
If you skip the , you will encounter several common, frustrating errors. 1. "MSVCP140.dll" or "VCRUNTIME140.dll" Not Found
In this comprehensive guide, we will explore everything you need to know about the : what it is, what it installs, hardware and software requirements, how to run it manually, advanced silent installation methods for labs and enterprises, common troubleshooting solutions, and best practices for game packaging. Reboot and try the UE4 Prerequisites again
Modern DirectX and Visual Studio components rely on 64-bit address space.
: Seamless integration with 64-bit versions of Windows 10 and 11. How to Locate and Deploy the Setup
The game launcher (e.g., Steam) doesn't have sufficient privileges to install files into the system directory.
If you're trying to launch a new game or the Unreal Engine and getting stuck on the "UE4 Prerequisites (x64)" setup, you aren't alone. This is a common hurdle for players on Reddit and other gaming forums. Find the file named UE4PrereqSetup_x64
Steam\steamapps\common\[Game Name]\Engine\Extras\Redist\en-us\ For Engine users : Look in your Engine installation directory under Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe Run as Administrator : Right-click the and select Run as Administrator
Check these are installed:
The —embodied in UE4PrereqSetup_x64.exe —is an essential component of the Unreal Engine 4 ecosystem. It quietly installs the runtime libraries that make UE4 games and applications run smoothly on millions of Windows machines. From the DirectX runtimes to the Visual C++ redistributables, every dependency is carefully selected to ensure a stable, high‑performance environment.