For those who has attended my speaking session ( Windows 7 Performance Investments by MVP Ken Lin) on Day 2 morning in TechDays 2009 @ HK, you may have seen that I have installed and run this tools in order to show what processes are running in my machine. This tool is a very good tool to show all the processes than Windows Task Manager. The unique capabilities of Process Explorer make it useful for tracking down DLL-version problems or handle leaks, and provide insight into the way Windows and applications work. For IT Professionals, you may found out what processes and what files are running in your windows. For Developers, you may check if any of your dependcies dll is running properly with your developed applications.
Process Explorer does not require administrative privileges to run and works on clients running Windows XP and higher (Including IA64) and servers running Windows Server 2003 and higher (Including IA64).
On 1st, April 2010, a newer version, Process Explorer v12.01, has released. It fixed some bugs and added some new wishing features. You can obtain equivalent command-line tools, Handle, ListDLLs and other useful tools at the Sysinternals Web site.