How to fix LU003?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The lu003 error code is a generic input/output error code. This means that there is a problem with the way the computer is trying to communicate with a peripheral device, such as a printer or scanner. There can be several reasons why this error code occurs, including a loose connection, a faulty cable, or a problem with the driver.

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1. Restart your computer

  1. Boot your computer into Safe Mode with Networking
  2. Click on "Start" and select "Restart"
  3. Press "F8" multiple times until you see the "Advanced Boot Options" screen
  4. On the "Advanced Boot Options" screen, choose "Safe Mode with Networking"
  5. Click on "Restart"
  6. Your computer will restart and will now be in Safe Mode with Networking
  7. Click on "Start" and select "Windows Update"
  8. Click on "Check for Updates"
  9. If there are any updates, click on "Update Now"
  10. Once the updates are installed, click on "Finish"
  11. Restart your computer
  12. When your computer starts up, log on
  13. If you are prompted for a password, enter your password
  14. Click on the "Start" button and select "All Programs"
  15. Click on "Accessories"
  16. Click on "System Tools"
  17. Click on "Restart"
  18. When your computer restarts, you will now be in the Windows Boot Manager
  19. Click on "Windows"
  20. Click on "Restart"
  21. Once your computer restarts, you will now be in the Windows desktop

2. Update your graphics driver

  1. Open Device Manager by right-clicking on My Computer and clicking on Device Manager.
  2. In Device Manager, locate and click on the graphics device you want to update.
  3. Click on the Driver tab.
  4. Select the Update Driver button.
  5. Browse to the location of the updated graphics driver file and select it.
  6. Click on the OK button.
  7. Restart your computer.

3. Reinstall League of Legends

  1. Close League of Legends if it is open.
  2. Uninstall League of Legends.
  3. Install League of Legends again.
  4. Verify your game cache.
  5. Restart your computer.
  6. Verify your game cache once more.
  7. Enter your login information for League of Legends.
  8. Click the "Play" button.
  9. If you are still experiencing lu003d error 01, please contact customer support.

4. Run League of Legends as an administrator

  1. Open League of Legends.
  2. Click on the "Administration" tab at the top of the window.
  3. Select "Lu003d" from the "LOBBY" dropdown.
  4. Click on "Lu003d" in the "LOBBY" list.
  5. Select "Settings" from the menu on the left.
  6. Click on "Lu003d" in the "LOBBY" list.
  7. Under "Settings" click on "General".
  8. Under "General" click on "Connection Settings".
  9. Click on "Account Settings" in the "Connection Settings" list.
  10. Click on "Enabled" in the "Account Settings" list.
  11. Click on "OK" in the "Account Settings" window.
  12. Click on "Lu003d" in the "LOBBY" list.
  13. Select "Configure" from the menu on the left.
  14. Click on "Lu003d" in the "LOBBY" list.
  15. Under "Configure" click on "Settings".
  16. Click on "Enabled" in the "Settings" list.
  17. Click on "OK" in the "Settings" window.
  18. Click on "Lu003d" in the "LOBBY" list.
  19. Select "Close" from the menu on the left.

5. Delete the "Config" folder in your League of Legends installation directory

  1. Open League of Legends and go to the main menu.
  2. Select "Options."
  3. Select "Game Settings."
  4. Under "General," select the "Config" folder.
  5. Select "Delete."

If you didn't find success with an option above, then try:

  1. Verify your League of Legends installation files
  2. Temporarily disable your antivirus software