IPv6 Connectivity – IPHLPSVC.EXE
Iphlpsvc.dll will be found in your Windows\System32 folder. It installs as part of your Windows Vista operating system. It provides IPv6 connectivity over an IPv4 network. You can find more about IPv6 at http://www.ipv6.org/ and at http://en.wikipedia.org/wiki/IPv6.
Microsoft has a patch to fix a security vulnerability in the Windows Vista Firewall that involves this file. You'll find it at http://www.microsoft.com/technet/security/Bulletin/ms07-038.mspx.
Safe
Microsoft