Bonjour mDNSResponder.exe Question

Hi.

I found this little program on my Vista system and don't know where it came
from.
Before I had Quicktime Alternative installed and that's the only thing where
I think it might came from.
Is there a way to uninstall it like getting rid of it for good and not just
disable it.
What kind of programs are there that install this Bonjour on a Vista system?
Please give me some advise here.

Thanks in advance,
Tommy