I changed the Active Network back to Home & all is working just fine. Is there a way to change the Network Name?

When I look at my C:\Users folder; I see Administrator, All Users (Hidden), Co, Cr, Default (Hidden), Default User (Hidden), Guest, HomeGroupUser$ & Public.

1. Is Administrator the Windows Built-In account, because the folder is empty (C:\Users\Administrator\AppData\Local\Google) & Co is the Administrator account I made when 1st installing 7.

2. Can I hide the folders Administrator & HomeGroupUser$?