How to Fix League of Legends Error Code 003: 5 Quick Fixes

League of Legends is widely known as an online multiplayer game. Numerous players encounter the League of Legends error code 003 when connecting to the LoL servers. What causes this vexing issue? How do you fix error code 003 in League of Legends? You can find answers in this MiniTool post.

About League of Legends Error Code 003

League of Legends Error Code 003 occurs during the game patching or installation. This error code indicates a problem between the patching server and the receiving client. Typically, error code 003 in League of Legends arises from an unstable connection between the two entities.

What Causes the Error Code 003 in League of Legends

To resolve League of Legends error 003 on your Windows PC, it’s important to understand the factors contributing to this issue. Below are several possible causes of this error:

• Windows Update: A pending Windows Update installation may trigger League of Legends error 003.
• Corrupt Content: The launcher may have downloaded corrupted content, leading to an error 003 in League of Legends when applying the patch. When there is an unstable internet connection or if the internet quickly disconnects and reconnects during the download, files may become corrupted. Corrupt content can also result in League of Legends not opening.
• Server Issues: League of Legends error code 003 might be due to a server issue, such as maintenance or a bug preventing game installation.
• Anti-Virus Interference: The antivirus might block the launcher from installing the patch or game due to a false alarm, flagging some computer files as suspicious and preventing installation.
• Internet Issue: If League of Legends error code 003 is caused by the Internet connection coming from an unallowed remote location or being flagged as suspicious by the server, the patch or update file will not be allowed to install.

Tips:

Ensure your internet connection remains stable and uninterrupted while patching or installing a game. If you experience difficulties with your internet connection, consider trying MiniTool System Booster. This software is designed to remove system clutter, improve the internet speed, and optimize your computer for maximum performance.

Workaround 1: Troubleshoot Internet Connection

Ensure uninterrupted connectivity, as potential network or bandwidth issues may result in reduced internet speed and disrupted connections. It is imperative to verify the stability and adequacy of your connection. To resolve League of Legends error code 003, you must have a connection speed of at least 5-10 MBPS. To do so, follow the steps to troubleshoot network connectivity on Windows 10/11:

Note:

Ensure you set up your computer to run League of Legends as administrator. If not, follow this guide to change the setting.

Step 1: Type Troubleshoot settings in the Windows Search box and press Enter.

Step 2: In the pop-up window, choose the Additional troubleshooters option in the right panel.

Step 3: Click Internet Connections from the list and choose the Run the troubleshooter button.

Workaround 2: Delete LoL_air_client Folder

Deleting a specific folder within File Explorer can solve the League of Legends error 003. This action eliminates any corrupted components associated with the game from your PC. The following steps outline the process of removing the folder:

Step 1: Press Win E together to open File Explorer.

Step 2: Navigate to the following location and open it:

C:Riot GamesLeague of LegendsRADSprojects

Note:

The lol_air_client folder may also be located in other directories. It is important to thoroughly search for the folder, paying close attention to its location.

Step 3: Right-click on the lol_air_client folder and select the Delete option.

After removing the folder, restart your computer and see if the problem in League of Legends has been resolved.

Workaround 3: Update Windows

Windows updates frequently include vital resolutions for application-related malfunctions. After checking the Windows version, if the update option is available, you need to install the Windows update to fix League of Legends error code 003.

Step 1: Press the Win I together to open Windows Settings and go to the Update & Security option.

Step 2: Click the Windows Update section in the left panel and choose Check for updates in the right pane to check available update options.

Step 3: If optional updates are available on your computer, follow the on-screen instructions to install them.

Step 4: After updating, restart your device and check whether error 003 in League of Legends is gone.

Workaround 4: Set up a VPN

The game’s accessibility may be impeded due to regional restrictions or limited internet connectivity. As a solution, setting up a VPN to establish the connection may prove beneficial in resolving League of Legends error code 003.

Workaround 5: Clear DNS Cache

Several users have recommended that clearing the DNS cache and data on their computers has assisted them in resolving the League of Legends error code 003. Follow the provided instructions carefully:

Step 1: Type cmd in the Windows Search bar, right-click Command Prompt, and choose Run as administrator. Click Yes in the UAC prompt.

Step 2: Cope and paste the following commands one by one and press Enter after each command:

ipconfig/flushdns

ipconfig/registerdns

ipconfig/release

ipconfig/renew

netsh winsock reset

Step 3: Wait for the commands to be executed. After finishing, restart your PC.

Verdict

how to fix League of Legends error code 003? Several possible solutions are introduced to you. In addition, you can also uninstall League of Legends and reinstall it to fix this error. Just try the methods and you can effectively get rid of this common problem.

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