After an extensive Web search, I discovered that Wicainventory is installed as part of the "Recommended" Win7 update KB2952664
Microsoft's Knowledge Base article for that update lists the files involved but does not say what it does, other than it is a "Compatibility update for upgrading Windows 7"
Some of its files are dated mid-April, 2014, and it was installed on my system in late April.
Of course, many of us are not in the least interested in upgrading Windows 7 to any currently offered alternative.
For instructions on uninstalling Windows updates, see
http://windows.microsoft.com/en-us/windows/remove-update#1TC=windows-7
Uninstalling it from my system did not require a reboot, but supposedly it'll be offered every time updates are available.