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 users
user accounts
user groups
userproperties
windows management