Windows administrator account

Hi,
I need help and i have few clarifications.
I have an administrator account created for Window 8.
#1 Q:
How do i manage the Pop up for UAC? Everytime i run app/install app, it asks for username and password for admin.
But i am sure, the account is an admin account?

#2 Q:
How come come administrator account can change the password of the LOCAL ADMINISTRATOR account (default admin)?

Thanks in advance.

UAC has nothing to do with the type of account you are using. If you want to turn off UAC, you have to do so manually. The easiest way is via msconfig.

Press Windows key + R, type msconfig and press Enter.
Click on the Tools tab, select Change UAC settings and click the Launch button.
Move the slider all the way to the bottom then click OK.

This does not completely disable UAC but is probably OK for normal use. If not, see here: http://www.eightforums.com/system-security/2434-disable-uac-completely.html

Check out the below links-
#1 A: http://www.eightforums.com/tutorials/5509-user-account-control-uac-change-settings-windows-8-a.html
#2 A: http://www.eightforums.com/tutorials/13315-local-account-password-change-remove-windows-8-a.html