i had the same virus that didn't even allow me to get into the Task manager.
I found that if i ctrl+alt+del quickly and repeatedly during bootup, it would bring it up before the virus did it's thing. I then was able to stop various programs that I knew weren't supposed to be there. It also effected winupdate, and a couple other things.
Sorry, but I hate to tell ya, I had to do a complete reinstall to get rid of it.