I have an application in VS2017 Comunity Edition, which is designed in layers (WEB, ENT, DAL, BLL). well, until a few days ago, in one of the computers in which I am developing, began to put problems when starting the application in debug mode (F5), since it remains eternally waiting for the browser to start the page defined in RouteConfig .cs. since it was never executed, try to start it with Ctrl + F5 which runs without problems, although of course, it does not allow me to debug the app. doing some tests, I realize that this happens when adding the BLL (business) layer as a reference in the Web app (MVC). To make sure of this, start another new web app (without references) and it will run smoothly in modi depuracion. This solution (all layers) is tested again on another computer with VS2017 Comunity Edition, but does not present this same problem. Any idea why this may be happening ?. Note: this only happens with chrome, since it tests with firefox and this problem does not occur Greetings and thanks for your time