Lost Ark – How to Fix Authentication Failed Error 10010

This guide might provide some help for those who struggle with the Authentication Failed 10010 Error.

Authentication Failed Error 10010 Fix Guide

Summary of Potential Fixes

A quick summary of possible methods to fix the Authentication Failed Error 10010 issue:

  • Verify Integrity of Game Files on Steam
  • Disable Internet Protocol Version 6
  • Refresh Game Credentials
  • Re-link your Twitch & Steam Accounts
  • Mobile Internet & VPN
  • Disabling your Antivirus Program Temporarily

Disclaimer: I am, the author of this guide, not responsible for any problems that might suddenly appear after you tried any of those suggested methods!

Verify Integrity of Game Files on Steam

The easiest thing you can do is verifying the game files via Steam.

  1. Open Steam
  2. Go to the Library
  3. Select Lost Ark
  4. Right click and go to Properties
  5. Select Local Files
  6. Click Verify the integrity of game files
  7. Let the process go through – this might take a couple of minutes
  8. Launch the game & see if it worked

This option is only availabe for those who have a Twitch & Amazon account.

  1. Go to Amazon Games
  2. Unlink your Steam account
  3. Go to Lost Ark Twitch Drops
  4. Unlink your Steam account
  5. Re-Link your accounts again on each website
  6. Restart Steam
  7. Launch the game & see if it worked

Disabling Your Antivirus Program Temporarily

This option is only availabe if you have a 3rd party Antivirus Program installed & running

A solution that sounds pretty weird and suspicious is temporarily disabeling your Antivirus Program right before you launch Lost Ark via Steam.

  1. Deactivate your Antivirus Program
  2. Launch Lost Ark
  3. Let it load until you’re able to choose a server
  4. Start your Antivirus Program again

Disable Internet Protocol Version 6

  1. Press Windows Key + R
  2. Type ncpa.cpl in the searchbar
  3. Right click on Network
  4. Go to Properties
  5. Uncheck Internet Protocol Version 6
  6. Save changes
  7. Launch the game & see if it worked

Refresh Game Credentials

  1. Open Windows Search and type cmd
  2. Run the command prompt as administrator
  3. Type ipconfig /flushdns & press enter
  4. Type ipconfig /registerdns & press enter
  5. Type ipconfig /release & press enter
  6. Type ipconfig /renew & press enter
  7. Type netsh winsock reset & press enter
  8. Restart your computer
  9. Launch the game & see if it worked

Wait inbetween each command for a few seconds.

Mobile Internet & VPN

This option is only available if you have a VPN or can setup a mobile hotspot

Some people claim that using Mobile Internet or a VPN solved the problem.

Which method helped me personally?

I tried almost everything I talked about in this guide. The only thing that fixed the Authentication Failed Error 10010 for me was turning off my antivirus before starting the game.

It’s possible that this is only a problem with Kaspersky antivirus. The solution that worked for me might not work for you.

Egor Opleuha
About Egor Opleuha 7011 Articles
Egor Opleuha, also known as Juzzzie, is the Editor-in-Chief of Gameplay Tips. He is a writer with more than 12 years of experience in writing and editing online content. His favorite game was and still is the third part of the legendary Heroes of Might and Magic saga. He prefers to spend all his free time playing retro games and new indie games.

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