Sid:

If you do not have to sign in when you boot the machine you probably do have administrative privledges.

If you do have to sign in with a name and password then go to the sign on screen by going to the start menu and at the bottom select "log off". Now select log on as a different user and in the sign in screen Enter - administrator as name and leave the password blank. Just hit enter without typing anything in password. (I am guessing that a password was never set) If this gets you on the system try to install Limewire and see if it will work. Once you get it installed you will want to log off and back on as you normally do because that is where your desktop and other personal settings are.

I hope this helps.

Norm