change the user account window appears

I've done a new user account in Windows Vista Home and now I want to delete it but when Click to change the user account window appears for less than a second and then disappear,

what I have to do

and there there Other Windows do like knowing this (my account is system admin)

Welcome to you toom2020,
I'm a little unsure of exactly what you mean. However have a look at these tutorials to see if they provide you with the answer.
If they aren't what you require post back & we will try to help you further.

http://www.vistax64.com/tutorials/122011-user-account-name.html

http://www.vistax64.com/tutorials/93026-user-account-delete.html

Thank you for your kindness to help me

But what I mean It is users accounts control window not appear ever so I can never deal with

, and I do not know how this happened
There is another problem of the update does not work
Is it possible to have a relationship



(Excuse me, but my English is very bad but I do use the Google translation. So I think the structure of sentences and words strange)