I don't know about Hoster or other MTU products but some software does require gearsec.exe, Mixmeister for one.
http://www.answersthatwork.com/Taskl...s/tasklist.htm . This isn't comprehensive by any means but I found quite a few unnecesary processes in this list.
They are trying to sell repair software which I haven't purchased so I'm not endorsing anything, but there is good info here.
Sam