C:\ Users lists SIX user accounts, some of them with massive data.
Control Panel / User Account lists only THREE User names: Administrator, Standard User and Guest.
Users Properties / Security / Group or User Names lists four: Everyone, SYSTEM, Administrator (one only) and Users (one only)...
access control
account cleanup
administrator
control panel
data management
file system
guest
security
standard user
system useruser account
user groups
userproperties
windows management