Fix League of Legends Error Code 900 on Windows 10

League of Legends is undoubtedly a famous online multiplayer game, but many users complain that they face League of Legends Error Code 900 when they try to log in to the LoL servers. If you want to fix League of Legends Error 900 on your Windows 10 PC, you have to know the reasons that cause this problem. This covers all the reasons that cause the problem that helps you understand how to fix error code 900 League of Legends on your Windows 10 PC.

How to Fix League of Legends Error Code 900 on Windows 10

Continue reading to know about the solutions to fix League of Legends error code 900 on Windows 10 PC in detail.

What Causes League of Legends Error Code 900?

Several reasons contribute to League of Legends Error 900 on your Windows 10 PC. Here are a few of them.

• The launched game does not have administrative rights; hence your PC does not allow it to patch.
• There is not enough space on your PC. Patching (the act of including additional codes to enhance gaming) needs some space.
• The installation files and configuration files of the game are corrupt and have to be replaced.
• The game client is corrupt or broken on your PC.
• The overprotective antivirus program or firewall is blocking the game.
• Outdated Windows 10 operating system and drivers.
• There is no stable internet connection to launch and play the game.
• Misconfigured game installation files.
• Inappropriate network settings and DNS address configurations.

Solutions to Fix Error Code 900 League of Legends

Here is a list of troubleshooting methods to help you fix League of Legends Error 900. Follow them in the same order to attain the best results.

Method 1: Basic Troubleshooting Steps

Following are the basic methods to solve the error.

1A. Restart PC

The general trick to resolve all the temporary glitches associated with League of Legends is to restart your computer. You can restart your PC by following the steps.

1. Navigate to the Windows Power User menu by pressing the Windows and X keys simultaneously.

2. Select Shut down or sign out.

3. Finally, click on Restart.

1B. Restart Router

This is a simple troubleshooting way that will help you fix League of Legends Error 900 within simple steps. You can restart your router by following our Restart Router or Modem guide. Once your router has restarted, check if you are able to fix the discussed error.

1C. Check Server Status

Very often, you may face League of Legends Error 900 due to problems from the server side. To check whether the server is offline or it has some technical problems, follow the below-mentioned steps.

1. Visit the official Riot-server status update page.

2. Then, scroll down and select League of Legends.

3. Then, select your Region and Language to continue.

4. On the next page, you can see any notifications for server-end errors. If there are any, you have to wait until they are resolved.

Also Read: How to Delete Your Riot Account

1D. Re-login Account

You can also fix the discussed error by signing out of the game before any error message prompts up. You can then wait for a while or restart your computer. Then, sign in again as instructed below.

1. When you are in the game, hit the Alt + F4 keys together.

2. Now, click on Sign Out.

3. Exit the game and restart your PC.

4. Enter your credentials and log in to the game again.

1E. Set Proper Date & Time Settings

Incorrect date and time settings in your computer may contribute to League of Legends Error Code 900 on Windows PC. To sync the date, region, and time settings in your Windows 10 computer follow the below-listed instructions.

1. Press the Windows + I keys together to open Windows Settings.

2. Now, select the Time & Language option as shown.

3. Next, in the Date & time tab, ensure the two values Set the time automatically and Set the time zone automatically options are toggled on.

4. Then, click on Sync now as highlighted above.

1F. Close All Background Processes

If there are too many background processes on your Windows 10 PC, you cannot access your network connection that easily, since all those tasks will take a share of the network. Also, RAM consumption will be more and the performance of the game will slow down apparently.

Follow our guide How to End Task in Windows 10 to close all other background processes on your Windows 10 PC.

After closing all the background processes, check if the discussed error in League of Legends is fixed or not.

1G. Update Windows OS

All the bugs and erroneous patches in your computer can be fixed by Windows updates. Microsoft releases frequent updates to fix all these problems.

Hence, make sure whether you are using the updated version of the Windows Operating System and if any updates are pending in action, use our guide How to Download and Install Windows 10 Latest Update

After updating your Windows Operating System, check if you are able to fix League of Legends Error 900

1H. Update GPU Drivers

If you want to enjoy any graphical games without any errors, your drivers must be in a perfect state. If the drivers are outdated or faulty, make sure you update them. You can search for the newest releases of drivers from its official websites, or you can update them manually.

Follow our guide 4 Ways to Update Graphics Drivers in Windows 10 to update your driver and check if you have fixed the discussed issue in LoL.

Also Read: How to Tell If Your Graphics Card is Dying

1I. Roll Back GPU Drivers

Sometimes, the current version of your graphics drivers may cause any conflicts in your game and in this case, you have to restore previous versions of installed drivers. This process is called rollback of drivers and you can easily roll back your computer drivers to their previous state by following our guide How to Rollback Drivers on Windows 10.

1J. Reinstall GPU Drivers

If you do not know how to fix error code 900 League of Legends after updating your GPU drivers, then reinstall device drivers to fix any incompatibility issues. There are several ways to reinstall drivers on your computer. Yet, you can easily reinstall Graphical drivers as instructed in our guide How to Uninstall and Reinstall Drivers on Windows 10.

 

After reinstalling GPU drivers, check if you can access League of Legends without any errors.

1K. Repair System Files

If there are any corrupt system files in your Windows Operating system, your PC may face a lot of internet connectivity issues. If you are experiencing League of Legends Error Code 900 very recently, there are some chances that your computer files have become corrupt or damaged.

Luckily, your Windows 10 PC has inbuilt repair tools like SFC (System File Checker) and DISM (Deployment Image Servicing and Management) that will help you fix all the corrupt files.

Read our guide on How to Repair System Files on Windows 10 and follow the steps as instructed to repair all your corrupt files.

1L. Disable Antivirus Temporarily (If Applicable)

One other possible reason that causes the discussed issue is your security suite. When your antivirus programs detect LoL files and folders as a threat, you will face several conflicts. So, read our guide on How to Disable Antivirus Temporarily on Windows 10 and follow the instructions to disable your Antivirus program temporarily on your PC.

After you fix League of Legends Error 900 on your Windows 10 PC, make sure to re-enable the antivirus program since a computer without a security suite is always a threat.

Also Read: Fix Avast Blocking League of Legends (LOL)

1M. Disable Windows Defender Firewall (Not Recommended)

At times, Windows Defender Firewall in your computer may prevent the game from being opened due to some security reasons. If you don’t know how to disable the Windows Defender Firewall, go through our guide How to Disable Windows 10 Firewall, and follow the instructions that are given.

Make sure to enable the Firewall suite again after fixing the issue in LoL as a computer without a firewall program is a threat. You can follow this guide Allow or Block Apps through the Windows Firewall to allow the app.

Method 2: Run League of Legends as Administrator

To avoid League of Legends Error Code 900 on your Windows 10 computer, run League of Legends as an administrator as instructed below.

1. Right-click on the League of Legends shortcut on the desktop or navigate the installation directory and right-click on it.

2. Now, select the Properties option.

3. Then, switch to the Compatibility tab and check the box Run this program as an administrator.

4. Finally, click on Apply and OK to save the changes.

Also Read: Fix League of Legends Error 004 in Windows 10

Method 3: Delete LoL_air_client Folder (If Applicable)

Another simple way to fix League of Legends Error 900 is to delete a specific folder in File Explorer. This removes the corrupt components in your Windows 10 associated with the game. Here are a few steps to delete the folder.

1. Press the Windows + E keys together to open File Explorer.

2. Now, navigate to the following location and open it.

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

Note: You may also find the lol_air_client folder in some other location too. Pay a bit extra attention to finding the folder.

3. Now, right-click on the lol_air_client folder and click on the Delete option.

Once you have deleted the folder, reboot the PC and check if you have fixed the issue in League of Legends.

Method 4: Run League of Legends Manually

If your computer takes some additional time to patch up League of Legends, you will face League of Legends Error Code 900 issue. Yet, you can manually patch the game by following the below-mentioned steps.

1. Press the Windows + E keys together to open File Explorer.

2. Now, navigate to the following location path.

C:\Riot Games\League of Legends\RADS\projects\lolpatcher\releases\deploy

3. In the Deploy folder, right-click on the LoLPatcher.exe executable file and click on Run as administrator.

Once you have launched your game manually, check if you face the issue in League of Legends again.

Also Read: Fix League of Legends Directx Error in Windows 10

Method 5: Tweak File Hosts

If the host file has edited entries of League of Legends, you will face League of Legends Error 900 issue. Hence, you have to remove the entries to resolve the same. Here are a few instructions to tweak hosts entries.

1. Press Windows + E keys together to open File Explorer.

2. Now, switch to the View tab and check the Hidden items box in the Show/hide section.

3. Now, copy and paste the following path into the navigation path of File Explorer.

C:\Windows\System32\drivers\etc

4. Now, select and right-click on the hosts file and select the Open with option as shown.

5. Now, select the Notepad option from the list and click on OK as depicted.

6. Now, the hosts file will be opened in Notepad as follows.

7. Add this line 67.69.196.42 l3cdn.riotgames.com to the bottom of the file.

8. Now, save the file by clicking on Ctrl+ S keys together.

9. Exit Notepad and check if you have fixed the discussed League of Legends Error Code 900 issue.

Method 6: Clear DNS Cache & Data

Few users have suggested that clearing the DNS cache and data on your PC has helped them fix attempt to join queue failed issue. Follow as instructed.

1. Hit the Windows key and type cmd. Then, click on Open.

2. Now, type the following commands one by one. Hit Enter key after each command.

ipconfig/flushdns
ipconfig/registerdns
ipconfig/release
ipconfig/renew
netsh winsock reset

3. Wait for the commands to be executed and restart your PC.

Also Read: Fix League of Legends Sound Issues

Method 7: Clear Drive Space

If your PC does not have any drive space to install any new patches from the game, you cannot fix League of Legends Error Code 900. Hence, firstly check the drive space and clean the temporary files if necessary.

Step I: Check Drive Space

To check the drive space in your Windows 10 PC, follow the below-mentioned steps.

1. Hit the Windows + E keys together to open File Explorer.

2. Now, click on This PC from the left screen.

3. Check the disk space under Devices and drivers as shown. If they are in red, consider clearing the temporary files.

StepII: Clear Temporary Files

If there is minimum available space in your computer contributing to the discussed problem, follow our guide 10 Ways to Free Up Hard Disk Space On Windows that helps you clear all unnecessary files in your computer.

Method 8: Change DNS Address

Several users have suggested that switching to Google DNS addresses may help you fix League of Legends Error 900. If you launch the game properly and face an error prompt, follow our guide to change the DNS address. This will help you fix all DNS (Domain Name System) problems so you can launch the game without any hustles.

After changing your DNS address, check if you can launch LoL without error screen.

Also Read: Fix League of Legends Black Screen in Windows 10

Method 9: Use Virtual Private Network

Still, if you are unable to fix your problem, you can try using Virtual Private Network. It ensures to keep your connection more private and encrypted. You can change the geographic region with the help of VPN settings so you can fix the discussed issue easily. Although there are so many free VPNs available over the internet, you are advised to use a reliable VPN service to enjoy premium versions and features.

Have a glance at our guide What is a VPN and how it works? to learn more about Virtual Private Limited.

If you are confusing how to set up a VPN on your Windows 10 computer, follow our guide on How to set up a VPN on Windows 10 and implement the same.

Once you have set up a VPN connection, check if you have fixed the discussed issue.

Method 10: Delete DirectX via Registry

Several gamers have confirmed that reinstalling DirectX on your PC helped them to fix error code 900 League of Legends. Here is how to delete DirectX installed file from Registry.

1. Press the Windows + R keys together to open the Run dialog box.

2. Now, type regedit and hit Enter key to launch the Registry Editor.

3. Now, navigate to the following location path in the Registry Editor.

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectX

4. Now, right-click on the InstalledVersion file and click on the Delete option.

5. Then, right-click on the Version file and then select the Delete option.

6. Now, follow our guide Download And Install DirectX on Windows 10 to reinstall DirectX on your Windows 10 PC.

Also Read: Fix League of Legends Frame Drops

Method 11: Reinstall League of Legends

Any misconfigured files in League of Legends will lead to error code 900 League of Legends issue even if you have followed all the above-discussed methods and updated all the pending actions. So, in this case, you have no other option than to reinstall the game. The game is tied up with your account and when you reinstall the game, you will not lose your progress. Here is how to reinstall League of Legends.

1. Hit the Windows key and type apps and features. Then, click on Open.

2. Now, search League of Legends in the list and click on it. Then, select the Uninstall option.

3. If you are prompted, again click on Uninstall.

4. Then, go to the League of Legends official website download page and click on the PLAY FOR FREE option.

5.  Sign up for your account and click on Download for Windows option. Then, click on the Install option.

6. Wait for the game to be installed. Navigate to My downloads in File Explorer and double-click on the setup file to run the application.

7. Follow the on-screen instructions to install the game on your Windows 10 PC.

8. Finally, relaunch the game and now you will have a fix for the discussed issue.

Note: Many users and online forums have reported that reinstalling the game with the Hextech Repair tool helped fix the error. Visit the official Hextech Repair tool site and download the program. It is free of cost, hence when you install and launch the tool, you will see an option to reinstall the game. Follow the instructions to fix the problem.

Also Read: How To Fix League Of Legends Client Not Opening Issues

Method 12: Contact League of Legends Support

Lastly try to contact League of Legends support team regarding your League of Legends Error 900 problem.

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We hope that this guide was helpful, and you could fix League of Legends Error Code 900 on your PC. Let us know what you want to learn about next. Also, if you have any queries/suggestions regarding this article, then feel free to drop them in the comments section.