Microsoft DOS taskkill command

Allows a user running
Microsoft Windows XP professional or Windows 2003 to kill a
task from a MS-DOS prompt.

Note:
Users running Windows XP home edition do not have access to
this command.

Syntax

taskkill [/s Computer] [/u Domain\User [/p Password]]] [/fi FilterName] [/pid ProcessID][/im ImageName] [/f][/t]

/s computer	Specifies the name or IP address of a remote computer (do not use backslashes). The default is the local computer.
/u domain\user	Runs the command with the account permissions of the user specified by User or Domain\User. The default is the permissions of the current logged on user on the computer issuing the command.
/p password	Specifies the password of the user account that is specified in the /u parameter.
/fi FilterName	Specifies the types of process(es) to include in or exclude from termination. The following are valid filter names, operators, and values.

Name	Operators	Value
Hostname	eq, ne	Any valid string.
Status	eq, ne	RUNNINGNOT RESPONDING
Imagename	eq, ne	Any valid string.
PID	eq, ne, gt, lt, ge, le	Any valid positive integer.
Session	eq, ne, gt, lt, ge, le	Any valid session number.
CPUTime	eq, ne, gt, lt, ge, le	Valid time in the format of hh:mm:ss. The mm and ss parameters should be between 0 and 59 and hh can be any valid unsigned numeric value.
Memusage	eq, ne, gt, lt, ge, le	Any valid integer.
Username	eq, ne	Any valid user name ([Domain\]User).
Services	eq, ne	Any valid string.
Windowtitle	eq, ne	Any valid string.

/pid processID	Specifies the process ID of the process to be terminated.
/im ImageName	Specifies the image name of the process to be terminated. Use the wildcard (*) to specify all image names.
/f	Specifies that process(es) be forcefully terminated. This parameter is ignored for remote processes; all remote processes are forcefully terminated.
/t	Specifies to terminate all child processes along with the parent process, commonly known as a tree kill.

taskkill /f /im notepad.exe

Kills the open notepad task, if open.

oh! that's what it is.