Sorry, your post is a little hard to understand…If what you are saying is, when you log on there are 2 user names, yours and a second one that you don’t want, but when you try to remove it, by going to Start>control Panel>User Accounts…only one name is listed, and that name only has ‘limited rights’ and in order to make any changes, you must have ‘Administrator rights.
To log on as an administrator, restart your pc, and when you are on the ‘Welcome’ screen press
Ctrl>Alt>Delete twice. From there you can create an administrator account and password. Once that is done, you can access the User Accounts to make any changes you want