how to make a process unstoppable?

Question

There are some process in the Windows-Task-Manager that you can't kill them in Non-Administrator users :

And even in Administrator users, when you try to kill them, you receive this below warning :

I want to know, is there any way to make another program's process like this? i.e if I want to write a program with VB6 for example, is there any way to prevent the user to kill its process? (having this behavior, or a similar behavior that prevent stopping it)

Answer 1

You can flag programs as critial. Doing this would bugcheck your system with Bug Check 0xF4: CRITICAL_OBJECT_TERMINATION when you try to kill the process. This is how csrss.exe is flagged and this is why you see this meesage.