How to Fix Sorry, We’ve Detected a Problem With Your Installation in League of Legends
If you’ve ever launched League of Legends only to be greeted with “Sorry, We’ve Detected a Problem With Your Installation”, you know how frustrating it can be. This error typically pops up when the Riot Client finds missing or corrupted game files, but that’s not always the whole story. The good news is that this problem is usually fixable with a few practical steps—no need to panic or immediately reinstall everything.
Why Does This Happen?
The error message suggests file corruption, but several other factors can trigger it:
- Corrupted or missing game files: Incomplete downloads, sudden crashes during updates, or interrupted patches can damage essential files
- Compatibility mode conflicts: Running League in compatibility mode—especially on Windows 11—can interfere with how the game accesses system resources
- Graphics overlay interference: Nvidia GeForce Experience or AMD overlay features consume memory and sometimes conflict with League’s file verification
- Permission issues: League executables might lack administrator rights to access necessary files
- Antivirus blocking: Security software may mistakenly flag or quarantine game files
- Resolution mismatches: Using an incompatible display resolution can trigger file verification errors
Most of the time, you can resolve this without a full reinstall. Let’s walk through the fixes, starting with the simplest solutions.
Fixes You Can Try
1. Disable Compatibility Mode
Running League in compatibility mode—particularly on newer Windows versions—often causes more problems than it solves. This is one of the most common culprits according to Riot’s official support guidance.
- Right-click the League of Legends shortcut on your desktop and select Properties
- Click the Compatibility tab
- Make sure “Run this program in compatibility mode for” is unchecked
- Click Apply, then OK
- Launch League of Legends again
This fix works because compatibility mode can interfere with how League accesses Windows resources, causing the client to think files are missing or corrupted when they’re actually fine.
2. Turn Off Graphics Overlays
If you use Nvidia GeForce Experience or AMD Radeon Software, the in-game overlay feature might be interfering with League’s file verification process. These overlays consume significant memory and can cause crashes or error messages.
For Nvidia users:
- Launch GeForce Experience (from desktop or system tray)
- Click the gear icon to open Settings
- Find In-Game Overlay and toggle it off
- Restart your PC and try launching League again
For AMD users:
- Open AMD Radeon Software
- Navigate to overlay settings and disable the feature
- Restart and test League
3. Run League Executables as Administrator
Sometimes League doesn’t have the necessary permissions to access all its files. Running the executables as administrator ensures permission issues aren’t causing the problem.
Navigate to your League installation folder (usually C:\Riot Games\League of Legends) and do the following for each file listed below:
- Right-click the file and select Properties
- Go to the Compatibility tab
- Check “Run this program as an administrator”
- Click Apply, then OK
Apply this to these files:
- League of Legends.exe (in the Game folder)
- LeagueClient.exe
- LeagueClientUx.exe
- LeagueClientUxRender.exe
Also apply the same setting to the Riot Client executable:
- RiotClientServices.exe (located in C:\Riot Games\Riot Client)
4. Adjust Resolution in the Config File
Some players have fixed this error by manually changing the game’s resolution setting. Using an incompatible or unsupported resolution can sometimes trigger file verification errors.
- Press Win + E to open File Explorer
- Navigate to C:\Riot Games\League of Legends\Config (your path may differ if you installed League in a custom location)
- Right-click game.cfg and select Open with → Notepad
- Find the resolution settings and change them to something standard like 1280 x 720 or 1920 x 1080
- Press Ctrl + S to save the file
- Launch League and check if the error is gone
5. Add League to Antivirus Exceptions
Your antivirus software might be scanning or blocking League files, which can trigger installation errors. Adding the executables to your exception list prevents interference.
For Windows Defender (built-in):
- Press the Win key, type Windows Security, and press Enter
- Click Virus & Threat Protection
- Click Manage Settings under Virus & Threat Protection Settings
- Scroll down to Exclusions and click Add or Remove Exclusions
- Click Add an Exclusion → File
- Browse to and add each of these files:
League of Legends files:
- C:\Riot Games\League of Legends\Game\League of Legends.exe
- C:\Riot Games\League of Legends\LeagueClient.exe
- C:\Riot Games\League of Legends\LeagueClientUx.exe
- C:\Riot Games\League of Legends\LeagueClientUxRender.exe
Riot Client file:
- C:\Riot Games\Riot Client\RiotClientServices.exe
If you use third-party antivirus software like Avast, Norton, or Kaspersky, check their documentation for how to add file exceptions—the process is similar but varies by software.
6. Reinstall League and Riot Client (Last Resort)
If none of the above fixes work, the issue is likely genuine file corruption that requires a clean reinstall. This removes all corrupted data and gives you a fresh installation.
- Press Win key, type Control Panel, and press Enter
- Go to Programs → Programs and Features
- Find League of Legends in the list and double-click to uninstall
- Repeat the process to uninstall Riot Client
- After uninstalling, navigate to C:\Riot Games and delete the entire folder (this removes leftover files)
- Download the latest Riot Client from the official League of Legends website
- Install the Riot Client, log in, and download League of Legends again
The download typically takes 30-60 minutes depending on your internet connection. Make sure you have at least 10-15 GB of free space on your hard drive.
What NOT to Do
- Don’t ignore Windows updates: Outdated Windows versions can cause compatibility issues with League’s client
- Don’t run multiple repair attempts simultaneously: Let the Riot Client finish one repair before trying another fix
- Don’t delete random game files: This makes the problem worse—stick to the fixes above or do a full reinstall
- Don’t run League from multiple locations: Having duplicate installations can confuse the client
If the Error Happens During Installation
If you’re seeing this error while trying to install League for the first time, try these additional steps:
- Move the installer to C:\: Place the installer file directly in your C: drive root, not in Downloads or Desktop
- Run as administrator: Right-click the installer and select “Run as administrator”
- Temporarily disable Windows Firewall: Go to Control Panel → System and Security → Windows Firewall → Turn Windows Firewall on or off, disable it for both network types, then try installing
- Check your internet connection: A spotty connection during download can corrupt files before installation even completes
- Make sure Windows is updated: Search for “Windows Update” in the Start menu and install all pending updates
When to Contact Support
If you’ve tried all these fixes and still see the error after 24-48 hours, it’s time to reach out to Riot Support. When you contact them, include:
- A description of which fixes you’ve already tried
- Your Windows version and any recent system changes
- Screenshots of the error message
- Your League of Legends installation path
You can submit a support ticket through the official League of Legends support website.
Conclusion
The “Sorry, We’ve Detected a Problem With Your Installation” error is annoying but fixable in most cases. Start with the simplest solutions—disabling compatibility mode and turning off graphics overlays—before moving to more involved fixes like reinstalling the game. Most players find success with one of the first three methods, especially disabling compatibility mode. If the problem persists after trying everything, don’t hesitate to contact Riot Support for personalized help.
