By Amanda Morin
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Windows Vista implements a new security feature called User Account Control (or UAC). In the previous NT-based Windows operating systems, a typical desktop user was part of the Administrators group, giving him full access to all facilities, even by malicious programs. However, in a mechanism similar to the firewalls, Windows Vista will stop the task trying to access a restricted resource and ask the user if he'd like to allow it. There may be some situations in which the User Account Control becomes too much of a burden and it's necessary to disable it or turn it off.
Click on "Add or remove user accounts" under the heading "User Accounts and Family Safety." The "User Accounts and Family Safety" icon is typically in the top-right of the dialog. If you cannot find it, use the search field at the top of the control panel.