Because you have a "network" there needs to be an administrator. If(or added) you've set-up an acct. that acct. can have administrator rights(you and and maybe system, if you like) so be sure to do so provided there is more than one acct. A generic network setting you should default or have been asked during the set-up to give "administrator rights" to that 1st acct.. It's best to have a system acct. and just leave it alone but has administrator rights, thus when a problem crops-up you can fall back on it for repairs, fixes, and/or security reasons. Your acct., as a separate acct. the one you use all the time should have administrator rights but needn't have one, BUT at times will ask(pop-up) to proceed should you require them for whatever reason. You can check any acct. status at the control panel under the "users acct" icon, edit or review your accts.. This all make more sense when multiple accts. are present and you surely don't want any kids to have "full" rights as that can be troublesome. Thus, an acct. can be tailored to your household network and have added security from wifi unwanted guests.
Just got a laptop (Inspiron 1521) and a Zyxel router - now we've got a home wireless network. It's working fine. But I'm about going out of my mind with this Administrator nonsense. I followed all the Windows instructions for setting up Workgroup, Administrator, and Users. But now that it's done, I'm constantly getting popup messages telling me either I can't do something because I don't have permission, or I'm asked to give the Administrator's password, etc. Seems like I'm always in the exact wrong place when I need to do some "administrative" thing! What I'd like to do is to do away with all Users, and just have one user, the administrator.
I could understand if this was an office or security was a big deal, but I'm thinking with the router's security and the computers' firewalls, why is it even necessary to do the Administrator/User thing in your home? Seems like overkill to me.