| Problem | Likely Fix | |---------|-------------| | Setup hangs at “Processing…” | Reboot, then run as Administrator. | | Error “Another version is already installed” | Uninstall all VC++ redistributables via Control Panel, reboot, re-run. | | Game still complains about prerequisites | Run the setup again – sometimes it misses one component on first pass. |
The exact components can vary depending on the version of the engine used to build the application, but the UE4PrereqSetup_x64.exe package typically installs a robust collection of the following:
: Often, the installer fails because a newer version of the Microsoft Visual C++ Redistributable (x64) is already present. Download and install the latest 2015-2022 package directly from Microsoft . Ue4 Prerequisites -x64- Setup
: When downloading UE4 from GitHub, you must run Setup.bat in the root folder first. This script automatically triggers the prerequisites installation.
Mark, like many eager developers before him, nearly clicked "Skip." It looked like one of those tedious bonus programs that piggyback on software installers. But his cursor hovered, and he hesitated. This is the story of what that little window actually does, and why ignoring it is the fastest way to break your game engine before you’ve even written a single line of code. | Problem | Likely Fix | |---------|-------------| |
The Installed DWORD should be 1 .
If you are trying to run a standalone game and it fails to launch, you can often find the installer manually within the game's folder, typically located at: Engine\Extras\Redist\en-us\UE4PrereqSetup_x64.exe Recommended System Specs for UE4 | The exact components can vary depending on
Once the operating system environment is confirmed, the most critical software dependency is the Microsoft Visual Studio Integrated Development Environment (IDE). UE4 relies heavily on the Microsoft toolchain for compiling C++ code. Historically, UE4 has had specific compatibility requirements; for older engine versions (4.25 and prior), Visual Studio 2017 was the standard, while modern versions (4.26 through UE5) generally require Visual Studio 2019 or 2022. It is not enough to simply install the IDE; the user must select specific "workloads" during installation. The most vital of these is "Game Development with C++," which installs the necessary compilers, debuggers, and the Windows 10/11 SDK. Additionally, the ".NET desktop development" workload is often required for the engine's toolchain to function correctly. Neglecting these specific workloads results in the engine failing to generate project files, effectively blocking development.
Recommended (comfortable development):