How to Fix “League of Legends failed to launch” Error

Are you getting a “League of Legends failed to launch” error when launching LoL?

Here’s the second part of the error, “Something unusual happened while trying to launch League of Legends”.

Followed by “Try closing an restarting” and an “Okay” button.

And, “If the problem persists, contact our player support team”.

In this quick and easy guide, you’ll learn how to fix the “League of Legends failed to launch” Error (LoL).

Here’s how to fix “League of Legends failed to launch”:

Close the League of Legends app.
Click on the arrow icon to show hidden icons on the bottom navigation bar.
Right-click the “Riot Games” icon and select “Exit”.
Search for “regedit” using Windows Search and open it.
HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft.
Windows NT > CurrentVersion > Image File Execution Options.
Right-click “DevOverrideEnable” and select “Modify”.
- (Optional) If you don’t have “DevOverrideEnable”, select “Image File Execution Options” and right-click an empty spot.
- (Optional) New > DWORD (32bit) Value > Rename it to “DevOverrideEnable”.
Set the “Value data” to 0 and select “OK” and restart your PC.