The windows task manager shows running processes and program
on the system. Sometimes, you need to use this to end
a non responsive program. To open task manager,
there are a couple of ways.
You can right click on the task bar, there you will find task manager.
Click on it and up it appears.
The Ctrl + Alt + Del key combination also brings up the
security options in windows 7 and vista from which
you can select the task manager.
In XP, the task manager comes up directly after pressing Ctrl + Alt + Del
The task manager is found in %SystemRoot%\system32\taskmgr.exe.
(this is usually C:\windows\System32\taskmgr.exe)
You can either browse to the folder and open it or
type it in the address bar of an explorer window
Another shortcut key to open the task manager is Ctrl + Shift + Esc