Computer systems often go slow or non-responsive to simple commands. While that can happen due to a wide spectrum of causes, the troubleshooting also varies. In an instance where the problem is your computer not shutting down, you can start with scanning your system for spyware, virus, malware, phishing tools, root kits, etc. Tick up the window updates to get your OS timely updated to avoid central issues. Sometimes, during shutting down, the computer aims to close all running application. Failure to do so can result in the problem. Before restarting or shutting down, make sure that all programs have been exited.