This program will tell you which programs are accessing your hard disk or using your CPU at any given moment. You will be able to determine why your hard drive is in use or what program is sucking up processor time.
Task Manager Alternatives
Task Manager is described as 'Windows Task Manager is a task manager application included with Microsoft Windows NT family of operating systems that provides detailed information about computer performance and running applications, processes and CPU usage, commit charge and memory information, network' and is a popular process monitoring tool in the os & utilities category. There are more than 50 alternatives to Task Manager for a variety of platforms, including Windows, Linux, Mac, BSD and Flathub apps. The best Task Manager alternative is Process Explorer, which is free. Other great apps like Task Manager are htop, System Informer, Mission Center and Resources.