Process Explorer shows you information on all the handles and DLL processes that your computer has opened or loaded. You can download it from Microsoft Technet.
This program works on Windows computers Windows 2000 SP4 and up. If you want the version that fully supports 64bit versions of Vista and Windows 7 you can download it with the Sysinternals Suite.
In the Processes tab under Windows Task manager all you see is the Image Name. With Process Explorer you see not only the Process, but it gives you a Description and the Company Name that owns the Process code.
I got this utility from my friend Rob Calam. It show me another good utility, Free System Optmization Tool, that you may want to take a look at also.