This is a Windows system installed file with Windows File Protection (WFP) enabled.
There are 48 versions of wmisvc.dll in the wild, the latest version being 6.3.9600.16384 (winblue_rtm.130821-1623). The average file size is about 160.55 KB.
WMI provides a uniform interface for any local or remote applications or scripts that obtain management data from a computer system, a network, or an enterprise. The uniform interface is designed such that WMI client applications and scripts do not have to call a wide variety of operating system application programming interfaces (APIs). Many APIs cannot be called by automation clients like scripts or Visual Basic applications. Other APIs do not make calls to remote computers.
(Note, the behaviors below are for all versions of wmisvc.dll, select a unique version for details.)
United States installs about 48.97% of WMI.