Windows 10: [FIXED] Unable to install Epic Online Services - EOS-ERR-1603

I'm not able to install the Epic Games Online Services using any methods EOS-ERR-1603. Here are some of the things I tried:1. Restarting2. Installing it via the launcher3. Installing it using EpicOnlineServices.exe4. Granting all possible rights to myself to these files using "Properties"5. Creating an "Epic Online Services" folder6. Reinstalling the Epic Games Launcher7. Cleaning every trace of Epic Games on my computer using Everything8. Reinstalling .NET Framework 3.59. Downloading the C and C# SDKs from the official website and pasting them in the root folder10. Redownloading the install

:)

 

EOS-ERR-1603 Epic Online Services install issue

I wanted to share a fix to the EOS-ERR-1603 error that some experience with the Epic Games Launcher and Online Services Install that I haven't seen elsewhere and I hope might be useful.

I followed all of the steps detailed here with no luck: https://www.epicgames.com/help/en-U...es-c5719359691291/eos-err-1603-a5720340831259

Various forums suggested the issue may be due to installing the launcher on a different drive, but mine is in the default location on C:\ so no joy with that either.

However I noticed in the registry there were entries pointing to "C:\Program Files (x86)\Epic Games\Epic Online Services" but the deepest folder didn't exist in my installation, so I created the folder "Epic Online Services" under the "Epic Games" folder:





I then re-ran the installer as described in step 6 on the Epic page linked to above, which in my case is C:\Program Files (x86)\Epic Games\Launcher\Portal\Extras\EOS\EpicOnlineServices.msi and the installer ran successfully fixing the issue.

Hope this helps someone.

 

Can’t Install Epic Online Services (EOS-ERR-1603)

Hello, Kyle Estes1

Welcome to the Microsoft Community.

It seems like you're encountering issues with installing or uninstalling Epic Online Services (EOS) on your computer.

Let's break down the steps and potential solutions:

Missing EpicOnlineServices. msi File:

The error message suggests that the installer is looking for a file named EpicOnlineServices. msi in a specific folder (C:\Program Files (x86)\Epic Games\Launcher\Portal\Extras\EOS\), but it's not finding it.

Normally, EpicOnlineServices. msi should be part of the installation package provided by Epic Games. If you're not finding it in the specified folder or anywhere else on your PC, it could indicate a corrupted or incomplete download of the Epic Games Launcher or the EOS component.

Steps to Resolve:

1. Redownload Epic Games Launcher: Sometimes, files can get corrupted during download. Try uninstalling the Epic Games Launcher completely from your system, then download and reinstall it from the official Epic Games website.

2. Check Firewall and Antivirus Settings: Ensure that your firewall or antivirus software is not blocking the installation or affecting the download process. Temporarily disable them while reinstalling if necessary.

Disclaimer: Temporarily turn off antivirus protection. However, keep in mind that if you do so, your device may be vulnerable to threats. So please turn it on immediately once issue fixed.

3. Clean Installation: After uninstalling, make sure to delete any remaining folders related to Epic Games (such as C:\Program Files (x86)\Epic Games\) to ensure a clean slate for reinstalling.

4. Run as Administrator: When reinstalling, right-click on the installer and choose "Run as administrator" to ensure proper permissions for installation.

5. Contact Epic Games Support: If the issue persists after trying these steps, it may be beneficial to reach out to Epic Games support. They can provide more specific troubleshooting steps or insights into known issues with the installer.

6. Regarding Control Panel Uninstall Issue:

If you're unable to uninstall Epic Online Services from the Control Panel due to the missing installation package (EpicOnlineServices.msi), it reinforces the idea that the original installation might be incomplete or corrupted.

Focus on reinstalling the Epic Games Launcher first, as this should ideally resolve both the installation and uninstallation issues.

In summary, the key steps are to ensure a clean reinstall of the Epic Games Launcher and check for any issues with your system's security settings. If problems persist, contacting Epic Games support for further assistance would be advisable.

Best regards



Bobhe | Microsoft Community Support Specialist

 

EOS-ERR-1602 when installing Epic Online Services component to Epic Games Launcher in Windows 11

I have been troubleshooting with Epic Games and none of the solutions they came up with worked for me, so the agent suggested I ask Microsoft for guidance since EOS-ERR codes are related to the MSI installer.

This is what I have tried:

Reinstalling the Epic Games Launcher

Updating Windows 11 and restarting the computer

Running Epic Games Launcher as administrator

Granting Read and Write permissions to Epic Games Launcher

Shutting down Windows Installer Service and then attempting the install

Running the Install and Uninstall Troubleshooter from Microsoft

Relocating Epic Launcher to my main drive

Even after all these actions I still get a prompt to install Epic Online Services from the Epic Games Launcher, and when I tried to install it I get the EOS-ERR-1602 error code when it fails to install.

Anyone know any next steps?

Thank you for reading this.