• you can easily see what's happening behind the desktop
• which processes are running on your computer
• you can see all modules which are loaded, or only those used by a particular process
• you're the master: Process Manager lets you close normally or kill any running process
• register and unregister modules
• complete information about process and modules
• see Windows error codes
• consult environment variables
• search for modules on the disk
• export the information for further use in Excel

So, with one quick look you can see that Process Manager is the tool you're looking for a long time, it shows you the backstage of your computer, and more, it lets you control things.