When I install UE5, a window always pops up saying that there is a problem with my Windows Installer package, and a DLL required to complete this installation cannot run, resulting in the failure of the UE5 installation. I would like to ask how to solve t
Hi @Changzhi86,
It looks like the error you’re experiencing is related to a Windows Installer or system dependency issue.
Here are a few steps to try:
Run the installer as an Administrator
- Right-click the installer or Epic Games Launcher and select “Run as administrator”.
Install required system dependencies manually
- Latest supported Visual C++ Redistributable downloads | Microsoft Learn
- Download .NET Framework | Free official downloads
Update Windows Installer (MSI Service)
- Make sure your Windows is up to date and the Windows Installer service is enabled.
- You can restart the service by running this in Command Prompt (as Admin):
“net stop msiserver” and “net start msiserver”
Clear temporary installation cache
- Press
Windows + R→ type%temp%→ delete all files. - This ensures no broken installer files are left behind.
Re-download the Epic Games Launcher
- Use the latest version from the official site:
https://www.epicgames.com/store/en-US/download
If you’re still facing challenges or have new questions, feel free to share.