VS2015 MSB3884 warning: Could not find rule set file

Question

When I imported an old solution in VS2015 I receive loads of warnings MSB3884 warning: Could not find rule set file .. when building the solution.

Q

Answer 1

Received this warning on a build machine where only VS 2017 Build Tools was installed (VS 2017 not installed). Once I installed the Static analysis tools (Individual components -> Code tools -> Static analysis tools) the warnings went away.