If you are unable to update League of Legends (it’s stuck at 0% Download), it might your antivirus software clashing with a recent patch. 

As a workaround, it may help to temporarily enable Passive Mode (at your own risk!) to update League of Legends: 

To temporarily enable Passive Mode: 

  1. Enable Passive Mode:

  2. Update League of Legends
  3. Disable Passive Mode
    • Use the instructions from Step 1 to clear the Passive Mode setting

If you are not running Avast or AVG Antivirus software and are still experiencing this issue, submit a ticket below and we'll get you sorted.