Running Windows 10 Pro (64bit platform, last updates KB3150513 on 3/16/17, Security update KB4013429 & general update KB4013418 on 3/15/17 ) & Teamviewer 12.0.75813, I am able to connect & Teamviewer runs for a while (typically 1-5 minutes) & then kicks me out, dropping the connection for no apparent reason. This has happened many times in succession. The problem seemed to start only recently in the past week or so, after recent Windows 10 updates were installed automatically by Windows Update in Microsoft. Before then, I did not have this problem. I have not installed any other new programs (though Microsoft also pushed through an Adobe security update on 3/15/17 also).
Wow just amazed how quickly teamviwer support picks up issues in the community board and promptly provides the right answers, it only been about 4 months. Maybe in another 4 years when a newer version of Windows is up we will hear back.