League of Legends Error Code 004: How To Fix

League of Legends Error Code 004 error is quite annoying. But don't worry we'll let you know how to fix it step-by-step. You'll be back on Summoner's Rift before you know it!

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League of Legends Error Code 004: This is how you fix this annoying error. | © Riot Games

You log into your game, excited to play some good old League of Legends, only to encounter a message stating League of Legends Error Code 004. Your whole day is ruined and you want to quit the game.

Before you throw your computer out the window, please read through this article as we go through this specific error code and give you a simple step-by-step guide on how to fix the League of Legends Error Code 004.

League of Legends Error Code 004 Explained

First of all let's go over what the Error Code 004 even is. It isn't really a self-explanatory error code like others. Basically, the "Error Code 004" in League of Legends refers to a problem where the game client is unable to patch or update itself properly.

  • While you wait for League of Legends to work again, why not read up on some lore with the comic: League of Legends - Lux?

Essentially, it indicates that something is preventing the game from applying updates as it should. This error can be caused by several reasons:

  • Corrupt game files: Over time or due to unexpected issues, some game files might become corrupted or incomplete.
  • Interruptions during updating: Any interruptions, like sudden shutdowns or internet connectivity problems, can cause the update process to halt and generate this error.
  • Insufficient permissions: Sometimes, the game might not have the necessary permissions to update files on your computer.
  • Antivirus or firewall interference: Security software can sometimes mistakenly block the game's update process.

If you encounter this error you'll have to take some troubleshooting steps like repairing the game, running it as an administrator, or temporarily disabling security software. If persistent, reinstalling the game can often resolve the issue.

But let's go over in detail how to fix the League of Legends Error Code 004.

How To Fix The League of Legends Error Code 004

As we just hinted at, there are multiple ways to fix this error. Most of the time one of the options listed below should be able to quickly help you get back into the game so you can keep climbing the LoL ranked ladder.

Here are eight ways to try and fix the League of Legends Error Code 004:

  • Run as Administrator:
    • Right-click the LoL client or launcher.
    • Select "Run as administrator".
  • Repair the Client:
    • Launch the LoL client.
    • Click on the gear icon in the top right.
    • Choose "Initiate Full Repair".
  • Disable Antivirus/Firewall Temporarily:
    • Disable your antivirus or firewall momentarily.
    • Try running the update again.
    • Remember to turn them back on after.
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Caitlyn is coming to take care of the League of Legends Error Code 004. | © Riot Games
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  • Ensure Enough Disk Space:
    • Check if your system has enough storage for the update.
    • Free up space if necessary.
  • Reset Network:
    • Restart your router/modem.
    • Alternatively, try a wired connection if using Wi-Fi.
  • Delete the solutions folder:
    • Navigate to the directory where LoL is installed.
    • Go to RADS\solutions.
    • Delete the solutions folder.
    • Relaunch the game to download fresh files.
  • Reinstall the Game:
    • As a last resort, uninstall League of Legends.
    • Download the latest version from the official website and install.
  • Check for Larger Server Issues:
    • Visit the Riot Games Service Status page to ensure no widespread server or patching issues.

Follow any of the steps to get back to playing League of Legends as quickly as possible. Of course, uninstalling the game should always be a last resort, since you don't want to waste your time if it was simply a network issue or something.

Hopefully this article was helpful and you were able to get back to playing League of Legends in no time.

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