Freeware
Process Explorer V10.21
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.
Writes settings to: Windows registry. I am accepting it as portable on the assumption that it will only be run occasionally during troubleshooting.
How to extract: Download the ZIP package and extract to a folder of your choice. Launch the program by double-clicking on procexp.exe.
System Requirements: Win95 / Win98 / WinME / WinNT / Win2K / WinXP