League of Legends: login failure - repair start
For error Riot provides to its Client a private repair Tool. First, try to fix the Problem with this:
- Start League of Legends.
- You go to the top right, click the Gear icon. It is a Pop-Up window with various options will appear.
- Click start on the "Complete repair" and confirm the next message with "Yes". The process can take some time.
- Open League of Legends then with administrator Rights.

League of Legends: error when Login
League of Legends: login failure - other W-LAN a try
- You have set up a guest access, you can stirring, the error message also.
- Log-in to your W-LAN with full access rights and try whether you can now log in to League of Legends.
Login error: the exception for LoL in your Firewall add
Sometimes the Firewall blocks the determined content of League of Legends, so that an unexpected error occurs.
- In this tip, learn how to in the Windows Firewall exception to add.
- Also for the popular suites from Avira and AVG we have the right tips.

The exception for LoL in your Firewall
Unexpected error - program content, uninstall and re-add
Nothing helps everything, you can try to uninstall individual components or the entire game and re-add. Due to the changeover to the new Client, it sometimes comes to problems during the Update process. A re-Installation may fix the error then.
- First, uninstall the Pando Media Booster. This often causes problems in League of Legends.
- Does the Login continue to fail, uninstall League of Legends completely and download the latest Version of the Clients.
- Perform the Installation with Admin Rights, so all major components can be re-installed.

The new Client is causing errors
This tip applies to League of Legends 7.13. What you in addition to the annoying FPS Drops in League of Legends can do, you will learn in the next article.
