Masque, please elaborate and give more info and where you found this info. I'm sure it would be useful to people who might have this same question in the future.
This is what I meant by elaborate:
C:\PROGRAM FILES\MICROSOFT BROADBAND NETWORKING\IPHLPSVR.EXE would be a possible location of the file in question.
I am sure most people would like something a bit more than "don't worry, it'll be ok". Those are famous last words spoken just before most disasters.
Also, many people feel better about these things if they have some assurance that the file is legit, not just someone coming along and telling them its ok with no explanation at all.