Here's how to Fix Epic Games Install Failed Error Code II-E1003.
This Epic II-E1003 Error usually means that the Epic Games Launcher couldn't download the game files for installation. There are a few possible solutions that you can try to fix this issue:
*Running the Epic Games Launcher as an administrator* by right-clicking on the Epic Games Launcher icon and choosing "Run as administrator" from the menu that appears.
*Verifying your game files* by following the instructions on the Epic Games website.
*Clearing Epic Games' cache* by deleting the webcache folders in the %localappdata%\EpicGamesLauncher\Saved directory.
*Uninstalling and reinstalling Epic Games* by following the steps on the Epic Games website.