How To Fix Error Code EOS-ERR-1603 Epic Online Services Has Failed To Install On PC
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Step 1) The error may prompt you to install Microsoft .NET Framework 3.5. In order to resolve this error, install the .NET Framework 3.5, click on Download and install this feature.
Step 2) Run Epic Games Launcher as an administrator
Step 3) Update Windows
Step 4) Grant write and read access to Epic Games Launcher
Step 5) Download epic online services from epic website and then extract the ZIP file in 'Epic Games / launcher / portal / extras / EOS'. Then run 'epiconlineservices.msi'
Download SDK - Epic Online Services
If this didn’t help, then do the same but download c# and after extracting the ZIP go to Epic Games / launcher / portal / extras / EOS / SDK / tools
and run the epiconlineservicesinstaller.exe
Step 6) Reinstall Epic Games Launcher to your main drive (C drive)
Step 7) RESET PC you may lose all the data & app, create a backup

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