![]() As always, if you have any questions or comments, please feel free to reach out to us on our support page. We hope that this article has helped you to understand what the “Protocol Negotiation Failed” error means in TeamViewer, and how to fix it. In this case, the best course of action is to uninstall and then re-install TeamViewer. If you’ve tried all of the above and you’re still seeing the “Protocol Negotiation Failed” error, the likely cause is a problem with your TeamViewer installation. If that works, you’ll need to add an exception for TeamViewer in your router’s firewall settings. To check this, you can temporarily disable your router’s firewall and try connecting again. If you’re still seeing the error, it’s possible that your router is blocking TeamViewer traffic. Make sure that TeamViewer is allowed to communicate through your firewall, and also check to see if any proxy settings are enabled that could be blocking the connection. If that doesn’t work, the next step is to check your firewall settings. This error can be caused by a number of factors, but fortunately there are a few things you can try to get things working again.įirst, try restarting both your computer and the TeamViewer application. ![]() If you’ve ever run into the “Protocol Negotiation Failed” error when trying to use TeamViewer, you know it can be a frustrating experience. How to Fix TeamViewer Protocol Negotiation Failed In order to fix this error, users can try a number of different solutions, such as updating TeamViewer, changing the firewall settings, or using a different remote access software application. This error can be caused by a number of factors, including incorrect firewall settings, an outdated TeamViewer version, or an incompatible operating system. However, users may sometimes encounter an error called “Protocol Negotiation Failed” when trying to connect to a remote computer using TeamViewer. With TeamViewer, users can remotely control a computer, view its desktop, and access files and applications. It is available for Microsoft Windows, macOS, Linux, iOS, and Android operating systems. TeamViewer is a remote access and remote desktop sharing software application. How to Fix TeamViewer Protocol Negotiation Failed What is TeamViewer Protocol Negotiation Failed?
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