Remember:
Some users see the same 2-second installer popup every launch — not because something failed, but because the launcher never stores a persistent “already checked” flag. It’s an intentional (if annoying) robustness feature.
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Games crashing on launch with errors like VCRUNTIME140.dll missing or MSVCP140.dll missing indicate that the C++ redistributables are missing or corrupted. Running the exclusive setup will repair these files.
This article provides an in-depth guide on understanding, downloading, installing, and troubleshooting the UE4 prerequisites for a smooth development experience. What are the UE4 Prerequisites? ue4 prerequisites x64 setup exclusive
Is this happening with a (e.g., Ark, Valorant) or when launching the Unreal Engine Editor ?
Share your experience in the comments below — the steps are identical, but Epic keeps moving the folder paths.
Press Windows Key + R , type appwiz.cpl , and press to open Programs and Features.
Let me know, and we can dive into ! Share public link Remember: Some users see the same 2-second installer
These errors typically indicate a conflict with an existing installation of the Visual C++ 2015 redistributables.
Install the files, reboot your system, and attempt to run your application again.
Download the official from Microsoft's support website. Run the tool and select Installing .
The file is digitally signed by Epic Games, Inc. You can verify the digital signature by right‑clicking the .exe , selecting Properties , and navigating to the Digital Signatures tab. A valid signature from Epic Games confirms the file has not been tampered with. This link or copies made by others cannot be deleted
C:\Program Files\Epic Games\UE_4.27\Engine\Extras\Redist\en-us\
If you are using Steam, Epic Games Store, or GoG, configure the platform to automatically run the UE4PrereqSetup_x64.exe upon the player's first launch of the game.
Windows Account Control (UAC) or antivirus software blocks the prerequisites installer from writing to system folders.