Disable Task Manager

With Disable Manager the user can to force close an applicaton and that is a great way to close troubled application. But on other hand, the naughty user can makes trouble in your computer, for example, close Antivirus application or any applications that should not closed.
To prevent that, just disable your Task Manager to safe your computer from unauthorized user.

Usually if we want to open Task Manager, we'll press Ctrl + Alt + Del keys. To disable it, we'll use Registry Editor. Click Start - Run menu, type regedit in textbox then hit Enter key to execute it. Then pointing to HKEY_CURRENT_USER | Software | Microsoft | Windows | CurrentVersion | Policies | System path. Then create a DWORD key (to create it just right click on empty space in right panel) and give it a new key DisableTaskMgr name. And change DisableTaskMgr to 1 (from its original value, 0). Close your Registry Editor then restart your computer.
After restarted, try to press Ctrl + Alt + Del keys then you'll get a message that says the Task Manager has disabled by Administrator.