When i start the client i get bug splat and the LoL client doesnt even get to show. Does anyone know how to fix it?


If you are using a non-standard screen resolution (16:9 and 16:10), you might not be able to see the patcher at all. Simply changing your screen resolution fixes the issue.

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Right click on your Desktop

Select Screen Resolution

Change your resolution to 1024x768

Click Apply

Re-launch League of Legends

If you are using a non-standard refresh rate on your monitor and you cannot see the patcher, it is likely that your monitor cannot display it. Changing the settings on your monitor to enable a standard refresh rate may solve the issue. Before changing the refresh rate, please make sure that your monitor can support the new refresh rate.

Right-click on your Desktop

Click the Screen Resolution icon

Click the Advanced Settings link

Click the Monitor tab

In the Monitor Settings box, change your Screen Refresh Rate

Change your Screen Refresh Rate to 59hz or 60hz (most monitors support this mode)

Click Apply

Re-launch League of Legends

Reset "winsock"

Winsock defines how a Windows network accesses TCP/IP services (i.e. The Internet). The patcher needs to connect to our servers in order to download and apply the update, so it needs to be able to use the TCP/IP service effectively. It is designed to work with the default TCP/IP settings, so resetting them may resolve the issue.

Press the Windows Key + R

Type cmd

Press Ok

Type the following

netsh winsock reset

Hit Enter

Restart your computer

Re-launch League of Legends

Run game as administrator

In order for the patcher to have access to your computer, you must run it with Administrator privileges.

Right-Click on the League of Legends shortcut

Select Run as Administrator

Force a Re-patch

Sometimes files become corrupt during the patching process, usually due to connection issues. Forcing a re-patch should help resolving this issue without resorting to a full client repair.

Go to your Riot Games folder (Default path: C:\Riot Games\League of Legends)

Open the following directory:

\RADS\projects\lol_air_client\releases{highest version number}

Delete the following files:


Open the Deploy folder and delete the following folders/files:

lib (folder)META-INF (folder)mod (folder)lolclient.exe (file)lolclient.swf (file) (file)

Delete the following directory:

C:\Riot Games\League of Legends\RADS\projects\lol_launcher

Restart League of Legends

The whole Patcher will now be re-downloaded, you will not see anything. Just wait, it can take some time.

Repair Game Files

Occasionally, patcher issues can occur when certain game files become corrupt. If you cannot force a repatch (see above point), using the repair function in the game launcher (the first window that appears when you run League of Legends) will fix any corrupted files.

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Run League of Legends

Click on the button with a gear that is located in the top right corner of the window

Click Repair

Wait. The repair function can take a long time.

Disable UAC

User Account Control can sometimes block the League of Legends patcher from modifying files on your computer. You can disable UAC by following Microsoft's instructions here.

Update/Disable Firewall

We have contacted a large number of firewall manufacturers to identify League of Legends as a harmless application and add exceptions for League of Legends automatically. It is possible that your firewall simply needs the latest update from the manufacturer to apply these exceptions.

Please note: Some firewalls require an active subscription in order to receive the latest updates.

The quickest and easiest way to solve your problem is to uninstall and disable your firewalls:

Click on Start

Click on Control Panel

Click on System and Security

Click on Windows Firewall

Click on Turn Windows Firewall on or off (You might need to provide the Administrator password at this step)

Under each Network location, select the Turn off Windows Firewall option

Reinstall .Net Framework

.NET Framework is a software library developed by Microsoft that runs primarily on Microsoft Windows. One of the dependencies of League of Legends is the .Net Framework 3.5. Even if you have 4.0, you may need to also have the 3.5 version installed to properly play League of Legends. You can download and install it here.

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level 2
Op · 8 yr. ago

It worked, thank you!

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