The setup for this installation of visual studio is not complete, really?
Have been using Vs 2017 for several months on dev machine. This fine morniong says setup incomplete. Am I missing something?
In this case you need to go to the Control Panel => Programs and Features and choose Visual Studio and update it.
VS 2017 (15.6.6) was fine for me on Friday 6/1/18 on Windows 10, but same issue as OP today after a restart.
As suggested by the dialog and Retired Ninja, I ran the Visual Studio Installer (to 15.7.3 after updating VS Installer) and that fixed it.
Note that the 15.7.3 update was a 7.73 GB download. Your download size may vary.