This is a Windows system installed file with Windows File Protection (WFP) enabled.
dhcpcsvc.dll has 60 known versions, the most recent one is 6.3.9600.16384 (winblue_rtm.130821-1623). The average file size is about 201.24 KB. This is a .NET Common Language Runtime (CLR) assembly.
This service automatically receives a Dynamic IP address from your DHCP server and DNS updates. Required for ICS / internet client and if you run IPSEC or an IP VPN, disable on a standalone system or one that has a static IP address. Take note: Most DSL/cable ISP’s use DHCP to provide internet access.
(Note, the behaviors below are for all versions of dhcpcsvc.dll, select a unique version for details.)
United States installs about 70.59% of DHCP Client Service.