how can we set a windows form property as a system file?

how can we use our windows form application as a system File.?
 For which no one can stop the app from the task Manager ..
can any one help.? 

Unless there's a serious security hole in the version of Windows you're using, you can't prevent a process with a user interface from being killed by an Administrator in the Task Manager.

If you could, then virus and other malware writers would have found their 'holy grail'.