: Sometimes a simple restart clears temporary memory conflicts.

Check out this quick visual guide on setting administrative permissions and basic compatibility fixes: How To Fix League Of Legends Not Opening - NEW 2026⚠️ YouTube• Jul 2, 2025 2. Fixing "Critical Error" & Client Freezes

: 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

: 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.

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

Performance drops are often tied to hardware bottlenecks or outdated software.