I'm currently using TeamViewer 10, though this happened with TeamViewer 9 too.
This error message pops up appears when I log into Windows 7, but not does appear again after hitting OK.
This is still problematic because TeamViewer does not start until the error is clicked, so I cannot remotely restart my computer.
I've attached a jpg with the error, which reads:
"TeamViwer: TeamViewer.exe...
↧