How to Fix League of Legends Error Code 004 / 002

[Administrator]

What is it?
This error usually pops up during patching or updating, caused by issues like corrupted files, network interruptions, or antivirus blocking the process.



Step-by-step Fixes
Check Disk Space
Make sure your drive (usually C:) has enough free space for the update. Clear some space if needed.

Run as Administrator

Right-click on the LeagueClient.exe or Riot Games launcher.

Select Run as administrator.

Disable Antivirus & Firewall Temporarily
Sometimes, antivirus or firewall software blocks the update.

Temporarily turn off your antivirus and Windows Firewall.

Try patching again.

Don't forget to turn them back on after!

Reset Network Settings

Open Command Prompt as Administrator.

Type these commands one by one, pressing Enter after each

pgsql
Copy
Edit
ipconfig /flushdns
netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
Restart your PC.

Use the Hextech Repair Tool (Riot's official repair tool)

Download and run the Hextech Repair Tool.

Use it to clean reinstall League of Legends or repair corrupted files automatically.

Reinstall League of Legends
If nothing else works, uninstall League of Legends completely, then reinstall it fresh from the official Riot Games website.

Bonus Tips
Make sure your Windows and GPU drivers are up to date.

Avoid running multiple launchers or overlays during patching.

Use a wired internet connection if possible for stable download speeds.