: In the same Compatibility tab, check the box for "Disable full-screen optimizations" to prevent Windows overlays from causing freezes.

This report covers essential troubleshooting steps for (LoL) errors, including crashing, freezing, and performance issues like FPS drops, based on the latest 2026 support guides. 1. Essential First Steps

: Navigate to your LoL installation folder (usually C:\Riot Games\League of Legends ). Locate and delete the Config and Data folders. The game will automatically reinstall fresh versions of these files when you relaunch.

: Open the Riot Client , click your profile icon, go to Settings , select League of Legends, and click Repair . This checks for and fixes missing or corrupted game files. 3. Improving FPS & Reducing Lag

If you experience a "Critical Error" crash during loading, corrupted temporary files are often the culprit.

Before diving into complex fixes, ensure these basics are covered:

: Sometimes a simple restart clears temporary memory conflicts.