When you encounter this issue, you’ll receive the following full error message; The following are the most likely culprit to this error;
Insufficient permissions issue with the Temp folder and/or Windows Installer folder.Virus/malware infection.Incorrect registry values.Corrupt Windows Installer.Incompatible 3rd-party programs.
Epic Games error code 2503 and 2502
If you’re faced with this Epic Games error code 2503 or 2502 issue, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue. Let’s take a look at the description of the process involved concerning each of the listed solutions.
1] Redownload the Installer
This could be a case of corrupted Epic Games Launcher installer. To rule this out, you need to redownload the installer and try the installation again and see if the error code 2503 or 2502 reappears.
2] Run the Program Install and Uninstall Troubleshooter
The Program Install and Uninstall troubleshooter helps you automatically repair issues when you’re blocked from installing or removing programs. It also fixes corrupted registry keys.
3] Run the Installer with Admin privilege
This solution requires you to run the Epic Games Launcher installer with Admin privilege on your Windows 10/11 device and see if the issue is resolved or not. Some affected users reported that the Run as Administrator option was missing from the right-click context menu for the installer; if this is the case, open the command prompt in elevated mode and run the command below. Replace the UserName placeholder with your actual user/profile name – and if the installer is not in the Downloads folder, specify the folder instead. Is issue unresolved? Try the next solution.
4] Run SFC scan
Windows system files corruption might be preventing the Epic Games Launcher installer from running successfully. In this case, you can run an SFC scan and then run the installer again and see if the issue is resolved. Otherwise, try the next solution.
5] Run the install operation in Clean Boot state
It’s possible this issue is being triggered by third-party applications or additional built-in features. This solution requires you to perform a Clean Boot of your Windows 10/11 device and then run the installer again. If the issue persists, try the next solution.
6] Check Windows Installer Service
These software are dependent on the Windows Installer Service. So, if you’re having an issue installing any software, it’s likely that the MSI service is not enabled. In this case, ensure that the Windows Installer Service is enabled.
7] Unregister and re-register Windows Installer Service
To unregister and re-register Windows Installer Service on your Windows 10 or Windows 11 computer, do the following:
Open Command Prompt in admin mode.In the command prompt window, type the command below and hit Enter to temporarily unregister the Windows Installer service:
Once the command is processed successfully and you get the success message, input the following command and hit Enter to register the Windows Installer once again:
After the second command is processed successfully, restart your PC once again, and run the Epic Games Launcher installer again.
8] Assign Full Control to Windows Installer folder and Temp folder
Insufficient permissions on the Windows Installer folder and/or Windows Temp folder can give rise to the issue at hand. In this case, you can assign Full Control permission to both folders. It is best to reverse the Permission changes you made after your job is done. Hope something helps!
