How does ones get the owner of a process ?

[DD]

Win XP Home Edition

I use System.Diagnostics.Process.GetProcesses()) to get info about the
processes running.
I don't see any members of class' Process' which allows me to get the
name of the owner of the process.

A related question: Can a running process hide itself from the
GetProcesses() call? If so, how can I find and kill it?

The reason I am asking this question, is that I apparently just picked
up a virus of some kind.

It is doing these things:
- trying to send a msg to IP 1.1.1.1 port 6667 every few seconds.
I prevented this from succeeding.
- immediately shutting down the window I get when I type Ctl-Alt-Del
- Immediately shutting down regedit, when I try to run it.
- runs even after a restart of the machine

So, I figured I would write a program to kill any process I want.
But sometimes I get an exception "access denied", even tho I am
running with admin privliges. I am guessing that this is for
processes owned by System.

If anyone has other ideas about what I can do, I'd sure like to hear
them. In particular, how can I find out which processes will
automatically run at startup, and how can I change that?

Alan