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.
Process Explorer Alternatives
Process Explorer is described as 'Shows you information about which handles and DLLs processes have opened or loaded. The display consists of two sub-windows. The top always shows a list of the currently active processes, including the names of their owning accounts, whereas the information' and is a leading process monitoring tool in the os & utilities category. There are more than 50 alternatives to Process Explorer for a variety of platforms, including Windows, Linux, Mac, BSD and Flathub apps. The best Process Explorer alternative is htop, which is both free and Open Source. Other great apps like Process Explorer are System Informer, btop++, Mission Center and Resources.