Announcements

Did you already try the new Windows 10 October 2020 Update?


Share your feedback and experience with TeamViewer on the new Windows build with our developers here.

Highlighted
Posted by
Henagon

Protocol negotiation failed

On Monday, I was able to successfully connect to my Windows 7 laptop from my Samsung Galaxy Tab 3 tablet using TeamViewer (TV). On Tuesday, I could not connect and Teamviewer on the laptop showed Incoming Connection then a Protocol Negotiation Failure message.

The tablet said that the connection was disconnected and tried to reconnect but never could. At the time, I had TeamViewer 10.0.93450 installed on the laptop. I am able to successfully connect to my Windows 8 desktop PC from the tablet, but I am having the same issue when I attempt to connect to the laptop from a Kindle Fire and an Apple iPad, so the problem is clearly only with communication between the laptop and the tablet.

I have tried the following to resolve this error, and none worked:

  • Restarted TV
  • Reboot the laptop
  • Reboot the tablet
  • Uninstall and reinstall TV on the tablet
  • Install the latest version of TV on the laptop
  • Ensured IPv6 disabled
  • Disabled the firewall
  • Disabled my antivirus
  • Configured TV to allow all Windows logon for all users
  • Configured TV for use with and without UDP
  • Uninstalled every update applied to my laptop in the month of February
  • Restarted the laptop in safe mode with networking and tested, with the same result

I am now seriously considering rebuilding my laptop, but I would reallky like to NOT have to do that, especially since I do not know that it will fix the issue. If anyone has any ideas for me to try, I would very much appreciate it.