League of Legends Error 003: Fixing It Is Easy

1

Restart your computer

2

As Administrator, run the game

Here’s how you do it:

1. Right-click the game icon on your desktop and go to the Compatibility tab
2. Look for the option Run it as an administrator
3. Start LoL again.

3

The Hextech Repair tool is available.

It is easy to install, run, and then check whether the problem persists. If that is the case, proceed to the next solution.

4

Remove content from the Releases folder

1. Go to Radis lol_game_client > releases
2. You should delete the releases file only, and not all files. Otherwise you could risk losing the entire game. This will allow you to delete the last patch, and your computer will then download it again.
3. Start the game again.

It’s possible to delete the contents from a file, but it may take some time depending on what is stored in that particular file.

5

Check the server status

6

Your firewall should be disabled

You can still use your firewall during the game if you have disabled it.

Disable Windows Firewall to Fix LoL Error 003:

1. Go to Control Panel > System and Security > Windows Firewall
2. Go to Allow an App or Feature through Windows Firewall
3. Scroll down to Change Settings, then locate LoL -> click the checkbox next to it
4. Go to Allow another Program -> Find LoL on the List -> Add -> Click OK.

Disable Mac Firewall to Fix LoL Error 003:

1. Click on the Apple Menu button -> go System Preferences View
2. Go to Security & privacy -> Select the Firewall tab -> Firewall
3. Start the game again to see if the problem persists.

When connecting to a League of Legends server, you should use a VPN and a proxy. These tools can cause many problems with connection.

7

Configure your DNS

1. Go to Control Panel -> Internet and Network -> Network Sharing Center -> Modify adapter settings -> access your active Network Adapter (your active Internet connectivity)
2. Right-click it -> select Properties > go to Internet Protocol Version 4 > select Property
3. Under Enter the following DNS server addresses: 8.8.8.8 to be the preferred DNS server and 8.8.4.4 to be the alternate DNS server
4. Now launch Command Prompt and log in as administrator. This command is .
5. Start the game again by restarting your computer

How to set up your DNS on Mac computers:

1. Click on the Apple icon to go to System Preferences and select Network
2. Click on Advanced to select DNS.
3. Note down all settings you have
4. Type the following: 8.8.8.8 on the first row and 8.8.4.4 on the second row under DNS server
5. Click OK to Apply and Test Your Game.