Its called teatimer. According to the site:
The Resident TeaTimer is a new tool of Spybot-S&D which perpetually monitors the processes called/initiated.
In addition, TeaTimer detects, when something wants to change some critical registry keys. TeaTimer can protect you against such changes again giving you an option: You can either "Allow" or "Deny" the change.
As TeaTimer is always running in the background, it takes some resources of about 5 MB.
Even though it is eating up resources it is well worth it. I have never had spyware on my machine. This might also have something to do with the fact that I exclusively use firefox for all my browsing!