Ensure your installer configuration checks for existing VCRedist registry strings before calling the UE4PrereqSetup_x64.exe flag.
: Navigate to your game's installation folder, usually found at:
I can provide specific file paths or custom troubleshooting scripts based on your setup. Share public link
The UE4 Prerequisites x64 package is a redistributable installer required to run games developed using Unreal Engine 4 (and sometimes Unreal Engine 5). It is not a virus or malicious software. This package primarily installs: ue4 prerequisites x64 setup exclusive
Many users think their game is broken, but the real issue is a stalled Windows Installer service. Running msiexec /unregister / msiexec /regserver in an admin command prompt often fixes it.
Then run:
Share your experience in the comments below ā the steps are identical, but Epic keeps moving the folder paths. It is not a virus or malicious software
Open the Run dialog again ( Win + R ), type temp , and delete all files inside that folder.
Uninstall all versions of Microsoft Visual C++ 2010, 2012, 2013, and 2015-2022 (both x86 and x64 versions).
UE4 Prerequisites Install Error - 0x80070001 Incorrect Function Then run: Share your experience in the comments
The phrase typically appears when installing or launching a game or application built with Unreal Engine 4 . It refers to a background installer that runs to ensure your Windows system has all necessary Visual C++ runtimes, DirectX, and other low-level components before the main software starts.
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 .
