If you've ever used Unix, you'll no doubt be well-aquainted with the commands ps and kill. On Windows, the graphical Task Manager performs these roles pretty well, but if you ever find yourself needing to resort to the command line to kill a process (e.g. for some reason on the Vista machine I am writing this on Task Manager just sits in the system tray flashing instead of opening), the Windows equivalents of ps and kill are tasklist and taskkill:

tasklist /v  - equivalent to ps aux
taskkill /f /im ncover*  - equivalent to kill -9 ncover*