PID number in Task Manager can’t be found

Use ProcessExplorer - http://technet.microsoft.com/en-us/sysinternals/bb896653 to check all processes and close what you want. It should show you every application on every account -if you have administrator rights of course.

To kill it programatically check this post: https://stackoverflow.com/questions/1642231/how-to-kill-a-c-process

When you don't know name of process, but you know name of executable that is run on your computer ( C:...\Metin.exe) then you can iterate through all processes and search for process that in list of loaded modules (Modules property) has module with name of your executable (FileName property in ProcessModule class) . Maybe it helps.

1. Download sysinternals suite from microsoft technet and unpack.
2. Find and run procexp.exe.
3. Click in Options menu on Replace Task Manager and than Restore Task Manager.
4. Click Ctrl+Alt+Del or on taskbar Run Taskmanager. Settings are restored and MS Taskmanager works fine. Because of my habit I can´t work without sysinternals.