Process Explorer is an advanced task manager. It is an indispensable tool for both beginners and power users. I use it all the time to kill tasks that refuse to be killed, or find what which processes are still holding on to a particular file or DLL so it refuses to be deleted.
Alternatively, Process Explorer Portable is also available, which is stealth.
|System Requirements:||WinXP / Vista / Win7|
|Writes settings to:||Windows registry|
|How to extract:||Download the ZIP package and extract to a folder of your choice. Launch procexp.exe.|