It's just a warning to indicate that TeamViewer is running and there could be issues with TeamViewer stealing focus (if I recall correctly... it's been a long while). I put the warning in as TeamViewer was causing a bunch of support messages back when TeamViewer was getting installed a lot.
Again, it's just an indicator and doesn't affect anything. There are other warnings that will be displayed if you encounter them, such as Nahimic or SonicStudio making VA not work. If it's a bother, you can turn it off in Options > System/Advanced > Show Third-Party App Warnings (uncheck the box).