Stop an application

yes

there is a command from the Windows NT4 resource kit you can use

in Windows XP you can use taskkill command

http://www.microsoft.com/windowsxp/home/using/productdoc/en/default.asp?url=/WINDOWSXP/home/using/productdoc/en/taskkill.asp

you just need to know the name of the process or task

you can use the task manager to test and check for what it may be

notepad will be notepade.exe

so in Windows XP

taskkill /s userspcname /u domainname\adminaccount /p mypassword /im notepad.exe

this should kill the notepad session on the "userspcname" with your credientials

The tool you need is already in XP.

tskill.exe

you just need to know the process id or process name.

ex.  tskill notepad

Not with Win 3.x, 9x, ME and alike.. Only the NT family of Operating Systems come with task killers..