Recently, I installed a new laptop with Visual Studio and the “normal” tool chain. While doing this, I encountered a strange error when installing the .NET Core tools.
Setup has detected that Visual Studio 2015 Update 3 may not be completely installed. Please repair Visual Studio 2015 Update 3, then install this product again.
However, repairing Visual Studio did not solve the problem. Luckily, I found this StackOverflow post. The problem could easily be solved by starting the setup on the command line with this command: