How to fix 'Epic Games Launcher setup wizard ended prematurely' error in Windows?

Some of the users are facing a very irritating problem while trying to install the Epic Games Launcher. The setup wizard closes itself and shows the following message:

The Epic Games Launcher Setup Wizard was interrupted before completing the installation. Your system has not been modified. To install this program at a later time, please run this Setup Wizard again.

The “Epic Games Launcher setup wizard ended prematurely” error could be caused by system compatibility issues, some conflicting software, or even problems with the installation package itself. Let's discuss below what may cause this issue and provide reasoning as to why it might happen.

Potential Causes

• Corrupted installation files
  The installer file for the Epic Games Launcher may have been corrupted during download. A partial or incomplete download can prevent the setup wizard from completing successfully.
• Antivirus or Firewall interference
  Security software like antivirus programs or firewalls might mistakenly flag the installer as a threat, blocking its processes or causing it to fail.
• Insufficient permissions
  Running the installer without administrative privileges can lead to issues, as certain files or settings may require elevated permissions to install.
• System compatibility problems
  The system may not meet the minimum requirements to install the launcher, or there could be compatibility conflicts with the operating system or other installed software.
• Conflicting software
  Other applications or background processes might interfere with the installation, particularly if they are related to gaming platforms or system utilities.

Observations and next steps

The error message indicates that the system remains unaltered, suggesting that the installation never reaches the stage where changes are applied. While the message advises rerunning the setup wizard later, this alone often does not resolve the underlying issue.

For manual fixes, you may want to try downloading the installer again, temporarily disabling antivirus software, running the installer as administrator, removing remnants of previous Epic Games Store installation, etc. These steps and additional troubleshooting tips are commonly listed below the article. For a more hands-off approach, we recommend you try FortectMac Washing Machine X9 PC repair application instead.

Fix 1. Delete the leftover files of previous Epic Games installation

Leftover files from a previous installation attempt can interfere with the setup process.

• Press Win E to open File Explorer and navigate to the default installation folder, typically located in the C drive.
• Delete any Epic Games-related folders, including those in Program Files or Program Files (x86).
• Type %appdata% in Windows search and press Enter.
• Remove everything related to Epic Games.
• Empty the Recycle Bin to permanently remove the files.

Fix 2. Run the installer as administrator

Running the installer with administrator privileges bypasses restrictions that might prevent it from modifying system files during the installation process.

• Right-click the Epic Games Launcher installer file.
• Select Run as administrator from the context menu.
• Follow the on-screen instructions to complete the installation.

Fix 3. Install the app from Microsoft Store

The Microsoft Store version of the Epic Games Launcher ensures compatibility and might avoid issues with standalone installers.

• Open the Microsoft Store on your Windows device.
• Search for Epic Games Launcher using the search bar.
• Click Get or Install and wait for the process to complete.

Fix 4. Use msiexec.exe to install Epic Games Launcher

The msiexec.exe tool allows users to install applications via the command line, which can help resolve installer-related issues.

• Save your installer in an easy to access place, for example, desktop.
• Make sure you have removed any old Epic Games app files, as explained in Fix no. 1.
• Press Ctrl Shift Esc to open the Task Manger.
• Click Run new task or File > Run new task (make sure you mark the Create this task with administrative privileges checkbox).
• Here, click Browse and select the location the installer is saved.
• If you can't see it, make sure you select All programs at the bottom-right corner.
• Put your cursor at the very start and type in msiexec.exe “PATH.” It should look something like this:
  msiexec.exe “C:UsersUSERNAMEDesktopEpicInstaller-17.2.0.msi”
• Click OK or press Enter.
• At this point, the installation should proceed as normal.
• Follow the on-screen instructions to complete the installation.

Fix 5. Try installing in Clean Boot

A Clean Boot disables unnecessary services and programs, reducing the chances of software conflicts during installation.

• Type msconfig in Windows search and hit Enter.
• Go to the Services tab and tick the Hide all Microsoft services checkbox.
• Select Disable all.
• Go to the Startup tab and click Open Task Manager.
• Here, right-click on each of the non-Windows entries and select Disable.
• Close down the Task Manager.
• Go to the Boot tab and tick the Safe boot option.
• Restart your computer and run the installer again.

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