How to Fix ‘Not Authenticated with’ Error on Minecraft

Some Minecraft users are reporting that they’re no longer able to join a Minecraft server. The error message that gets displayed is “Not authenticated with’. This problem is confirmed to occur on Windows 7, Windows 8.1, Windows 10, and Windows 11.

Not Authenticated with – Error

After looking into this issue deeply and analyzing other user reports, it turns out that there are several different underlying issues that might produce this error. Here’s a shortlist of potential culprits that might be responsible for this Minecraft error:

  • Login remnants from the old account – As it turns out, this error is a fairly common occurrence in situations where you recently changed the Minecraft nickname. In this case, you should be able to fix the issue by forcing the server to acknowledge the change by signing out of your account before logging in again. This is only effective in those situations where account details have recently been modified.
  • HOSTS file contains conflicting data – There are situations where the hosts’ file can facilitate the conflicting exchange of domain information related to Mojang or Minecraft. If this scenario is applicable, you should be able to fix the issue by editing the Hosts file and deleting any mention of Mojang or Minecraft before re-launching the game.
  • WTFast (or similar software) interference – According to a lot of users that have to get around a high latency, WTFast and a few other similar tools that claim to improve the in-game latency are known to cause this error with Hypixel servers. To fix this issue, all you can do is disable the active optimization and uninstall the software completely if the issue persists.
  • Usage of cracked accounts – Keep in mind that a variety of servers will immediately disallow cracked accounts obtain from questionable sources like Mcleaks or Minshafter. If you’re using a cracked account and you’re experiencing this issue on Hypixel and other reputable servers, your only option is to get a legitimate Minecraft account (from the official website or from an authorized reseller) or stick to playing on cracked servers only.
  • Account-related issue – There’s also the scenario where the issue is occurring due to a temporary ban or account restriction enforced automatically. In this case, if you feel you haven’t breached Mincraft’s rules and ToS in any way, get in contact with Mojang’s support and ask for clarifications.

Now that you are familiar with every potential scenario that might be triggering the “Not authenticated with‘ error, here’s a list of methods that other affected users have successfully used to fix it and play the game normally.

Refresh login session

As it turns out, this particular issue is often reported to occur in situations where you recently change the name of your Minecraft nickname. There’s nothing wrong with this, of course, but because of the way the game is created, the server won’t acknowledge the new game until you sign in once again with your Minecraft account.

If you find yourself in this particular scenario, you should be able to get the issue fixed by logging out of your account and then logging back in.

You can do this by clicking the drop-down menu associated with your account (top-left corner of the screen), then click on Log out from the context menu that just appeared.

Logging out of Minecraft account

Once you have successfully signed off of your account, log back in by inserting your Minecraft account credentials once again and see if you still get the “Not authenticated with” error when you try to join or create a server.

If the same kind of issue is still occurring, move down to the next potential fix below.

Remove Minecraft mentions from hosts file

As it turns out, another fairly common reason why you can expect to see the ‘Not authenticated with’ is a scenario in which your HOSTS file contains conflicting information about the game (Minecraft) or the game publisher (Majong).

Note: The HOSTS file is a plain text file that Windows uses to map connections between an IP address and the domain names. This file is capable of overriding the DNS and redirect the URLs or IP addresses to different locations depending on the way it’s configured.

If the Hots file on your computer contains information that points the launcher to the wrong domain, you should be able to fix the ‘Not authenticated with’ error swiftly by editing the HOSTS file and ensuring that you delete any lines that are currently mentioning Mojang or Minecraft.

Important: This operation will force your operating system to disregard any domains that are linked with certain IP addresses which should allow you to connect and create servers without encountering the same issue.

Follow the instructions below for a quick guide on removing any Minecraft and Mojang mentions from the HOSTS file:

  1. Start by pressing Windows key + R to open up a Run dialog box. Next, type ‘%SystemRoot%\System32\drivers\etc’ inside the text vox, then press Enter.
    Open the ETC folder
  2. Once you’re inside the etc folder, look for the hosts file (not the hosts.ics file). Once you see it, right-click on it and choose Open With, then select Notepad or Notepad++ if you have it installed.
    Opening up the hosts file
  3. Next, scroll down to the bottom of the HOSTS file and check to see if any line is dedicated to Mojang or Minecraft. If you notice any of them, right-click on each and delete the line entirely.
    Deleting lines associated with Minecraft or Mojang
  4. Once the HOSTS file has been successfully cleaned from any mentions of Mojang or Minecraft, go ahead and save the changes by clicking on File (from the ribbon bar at the top) and then on Save.
    Save changes to the HOSTS file
  5. Finally, now that the hosts file has been modified, reboot your PC and launch Minecraft once the next startup is complete to see if the issue is now fixed.

In case the problem is still not fixed, move down to the next potential fix below.

Disable or Uninstall WTFast (or equivalent software)

As it turns out, you can also expect to deal with this issue in those situations where you’re using WTFast (or similar software) to improve the in-game latency of Minecraft or other games that you’re currently playing.

According to a lot of affected users, you can expect to encounter the ‘Not authenticated with’ error due to interference that makes Hypixel (or a different minigame server) unreachable.

If you find yourself in this scenario, you should start by disabling the connection optimization related to Minecraft first.  In WTFast, you can do so by disabling the Optimize Connection toggle associated with Minecraft.

Disabling the Optimize Connection toggle

After you do so, launch Minecraft once again and see if the problem is now fixed.

If the same kind of issue is still occurring even after the active optimization is enabled, you should move forward with uninstalling this tool altogether. To do this, follow the instructions below:

  1. Press Windows key + R to open up a Run dialog box. Next, type ‘appwiz.cpl’ inside the text box, then press Enter to open up the Programs and Features menu.
    Opening up the Programs and features menu

    Note: If you’re prompted by the User Account Control (UAC), click yes to grant admin access.

  2. Once you’re inside the Programs and Features menu, scroll down through the list of installed programs and locate WTFast (or the equivalent software) that you suspect is causing the issue with Minecraft.
    Uninstalling WTA fast
  3. Once you’re inside the uninstallation screen, follow the on-screen instructions to complete the uninstallation, then reboot your PC and see if the “Not authenticated with” is now fixed.

If the same kind of problem is still occurring, move down to the next potential fix below.

Use a legitimate account

As it turns out, this particular issue is often associated with the usage of a cracked account or an account obtained from a questionable third-party website.

The ‘Not authenticated with’ error is often associated with an account obtained from McLeaks or a similar website.

If you’re using an account obtained from a questionable third-party re-seller like Mcleaks or Mineshafter, chances are your alt has been banned. This is quite typical for people attempting to connect to a Hypixel server.

In this case, there is nothing you can do other than ensure that you’re using a legitimate account in order to fix the issue.

In case your Minecraft account was obtained through legitimate means and you’re still unable to join Hypixel servers (even after following every method above), move down to the next potential fix below.

Contact Mojang support

If none of the methods above have proven to be effective in your case and you’re convinced you’re using a legitimate account and you haven’t breached the ToS of Minecraft, the only option left at your disposal is to get in contact with Mojang’s support.

You can do so by accessing the official help page, then scroll down to the bottom of the screen and click on Contact from the list of options available at the bottom of the page.

Getting in contact with Mojang

Next, go through the on-screen form selecting the language, game title, platform. When asked to select the question category, choose Account Support.

Account support

Finally, fill out the remaining details, explain the issue as thoroughly as possible inside the What can we help with? box and hit Submit. In most cases, you will get your answer in less than 24 hours.


Kamil Anwar

Kamil is a certified MCITP, CCNA (W), CCNA (S) and a former British Computer Society Member with over 9 years of experience Configuring, Deploying and Managing Switches, Firewalls and Domain Controllers also an old-school still active on FreeNode.