Blog

How to Fix TeamViewer Authentication Rejected Error on Windows 11: Step-by-Step Solutions

TeamViewer is a popular tool for remote desktop access and support. Sometimes, Windows 11 users may encounter an “Authentication Rejected” error when trying to connect through TeamViewer. This error can be frustrating but is usually fixable with some simple steps.

In this guide, you will learn easy and clear solutions to resolve the TeamViewer authentication problem on your Windows 11 PC. No technical jargon, just straightforward instructions.

Follow the steps carefully, starting from the simplest checks to more detailed fixes. By the end, you should be able to connect without issues.

Let’s get started and fix your TeamViewer authentication error quickly.

Quick Note: What to Check Before You Begin

  • Verify Your Credentials: Make sure you are entering the correct TeamViewer ID and password. Typos are a common cause of authentication errors.
  • Internet Connection: Ensure both devices have stable internet connections. Connectivity issues can cause authentication failures.
  • TeamViewer Version: Confirm that both computers are running compatible and updated versions of TeamViewer.
  • Account Status: If you use a TeamViewer account, check that your account is active and not blocked or limited.

Step 1: Restart TeamViewer and Your Computer

Sometimes, the simplest solution works best. Restarting the TeamViewer application can clear temporary glitches that cause authentication errors.

  1. Close TeamViewer completely on both the local and remote computer.
  2. Restart your computer to refresh system processes.
  3. Open TeamViewer again and try to connect.

Restarting clears any temporary issues with the software or network connections and often resolves minor authentication problems.

Step 2: Check and Reset TeamViewer Password

If you are using a personal password or easy access credentials, these might be incorrect or outdated. Resetting the password can help.

  1. Open TeamViewer on the remote computer.
  2. Go to the Extras menu and select Options.
  3. Click on the Security tab.
  4. Find the section for Personal Password and set a new password.
  5. Save the changes and try connecting again with the new password.

This step ensures you have the right credentials and avoids errors caused by wrong or outdated passwords.

Step 3: Verify Your TeamViewer Settings on Windows 11

Windows 11 may sometimes block TeamViewer from functioning properly due to system permissions or firewall rules. You need to allow TeamViewer through these security settings.

Allow Through Windows Firewall

  1. Press Windows + S and type Windows Defender Firewall. Open it.
  2. Click on Allow an app or feature through Windows Defender Firewall on the left pane.
  3. Find TeamViewer in the list. Make sure both Private and Public checkboxes are ticked.
  4. If TeamViewer is not listed, click Allow another app… and add TeamViewer manually.
  5. Click OK to save changes.

Run TeamViewer as Administrator

Running TeamViewer with elevated permissions can help avoid authentication issues caused by insufficient access rights.

  1. Right-click the TeamViewer shortcut or executable.
  2. Select Run as administrator.
  3. Try connecting again.

If this solves the problem, you can set TeamViewer to always run as administrator:

  1. Right-click TeamViewer > Properties.
  2. Go to the Compatibility tab.
  3. Check Run this program as an administrator.
  4. Click Apply and then OK.

Step 4: Clear TeamViewer Cache and Temporary Data

Sometimes corrupted cache files cause authentication errors. Clearing these files can help fix the problem.

  1. Close TeamViewer completely.
  2. Press Windows + R, type %appdata%TeamViewer, and press Enter.
  3. Delete all files and folders inside this directory.
  4. Restart TeamViewer and try connecting again.

Deleting cache forces TeamViewer to create fresh data, which can clear bugs related to authentication.

Step 5: Update TeamViewer to the Latest Version

Running an outdated version of TeamViewer can cause compatibility and security issues, including authentication failures.

  1. Open TeamViewer.
  2. Go to Help > Check for new version.
  3. If an update is available, download and install it.
  4. Restart TeamViewer and try again.

Keeping the software updated ensures you have the latest fixes and security improvements.

Step 6: Check Your TeamViewer Account and License Status

If you are using a TeamViewer account to log in, authentication errors might be due to account restrictions or license issues.

  • Visit the TeamViewer Management Console and log into your account.
  • Check for any alerts, license expirations, or account blocks.
  • Ensure your subscription or license is active and valid.

Sometimes, TeamViewer limits connections if license terms are breached or accounts are locked.

Alternative Option: Use Easy Access Instead of Password

TeamViewer’s Easy Access feature lets you connect without entering a password every time. This can bypass some authentication issues.

  1. Open TeamViewer on the remote PC.
  2. Go to Extras > Options > Security.
  3. Under Easy Access, check Grant easy access and assign your TeamViewer account.
  4. Save the settings.
  5. On your local PC, log into your TeamViewer account and connect using Easy Access.

This method is convenient and reduces errors related to incorrect passwords.

FAQs

Why does TeamViewer say “Authentication Rejected”?

This error usually means the password or credentials entered are incorrect, or the connection is blocked by firewall or security settings.

Can network issues cause authentication errors?

Yes, unstable or restricted internet connections can interrupt authentication and cause connection failures.

Do I need to update both computers with the same TeamViewer version?

While not mandatory, using compatible or latest versions on both sides helps avoid errors and improves security.

Is it safe to run TeamViewer as administrator?

Running as administrator gives TeamViewer higher permissions but should be done only if necessary and from trusted sources.

What if I forgot my TeamViewer password?

You can reset the password from the remote computer’s TeamViewer settings or use Easy Access if previously set up.

When Nothing Works

If you have tried all the above steps and still face the “Authentication Rejected” error, consider these options:

  • Reinstall TeamViewer: Uninstall and then download and install the latest version from the official website.
  • Check for Conflicts: Disable other remote desktop software temporarily to avoid conflicts.
  • Contact TeamViewer Support: Visit the TeamViewer Community or official support for personalized help.
  • Use Alternative Remote Tools: If urgent access is needed, consider alternatives like Microsoft Remote Desktop or AnyDesk temporarily.

Conclusion

The TeamViewer “Authentication Rejected” error on Windows 11 can usually be resolved through simple troubleshooting steps. Start by checking your credentials and internet connection, then move on to adjusting firewall settings, resetting passwords, and updating the software.

Allowing TeamViewer through Windows Firewall and running it as administrator often fix permission issues behind authentication problems. Clearing cache and verifying your account are also important steps.

If all else fails, reinstalling the app or seeking official support will help you regain access quickly. Following these step-by-step solutions will get your TeamViewer working smoothly again on Windows 11.

Leave a Reply