@MikedMike  I take it from your response (the screen shot you uploaded was not legible) that you were ultimately able to access Ambari via the URL and port number available on your machine.   The behavior you are now describing could be due to lack of memory available to the virtual machine. Note that the Sandbox Deployment and Install Guide calls for at least 10 GB RAM dedicated to the virtual machine, but that doesn't mean it will perform acceptably at that level, more RAM is better. Those instructions were written against Virtual Box version 5.1. If you have it available, you might want to try shutting everything down gracefully, allocating more memory to the virtual machine and then starting everything up again and seeing if responsiveness improves.   Another approach would be to give up on using the HDP 3-based Sandbox because it is no longer current (for example data analytics studio is on it's way out and Ambari is already dead). If you're just looking to evaluate a data platform, you can currently do so without a Cloudera subscription by downloading and installing the Trial Version of CDP Private Cloud Base Edition of Cloudera Data Platform. Cloudera has an extensive tutorial on installing CDP Private Cloud Base in an Infrastructure as a service (IaaS) fashion using AWS on its website.     ... View more