The ability to use a computer is controlled through a

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The ability to use a computer is controlled through a user account . The user account identifies a specific user. Logon is the process of authenticating to the computer by supplying a user account name and the password associated with that user account. On Windows systems, the ability to perform actions on a computer, such as modifying system settings or installing hardware, are called rights . Access to files, folders, and printers is controlled through permissions . Permissions identify what the user can do with the associated object. Windows includes two built-in users. o The Administrator account has all rights and permissions on the computer. o The Guest account has very limited capabilities, usually restricted to logging on, viewing files, and running some programs. As a security measure, Windows XP and later automatically disable the Guest account in order to prevent logging on to the system. Rights and permissions can be assigned to multiple users by using groups . Privileges assigned to the group are granted to all group members. On a Windows system, users and groups are stored in one of three locations: o Local accounts are stored on each computer and control access to resources on that computer. o Domain accounts are stored in a central database called Active Directory. A domain controller is a special server that stores user accounts, groups, and the rights and permissions assigned to them. o Online accounts are stored online by Microsoft. Windows systems have default groups that are created automatically. These groups have pre-assigned rights, permissions, and group memberships. These groups can be renamed, but not deleted. In most cases, you should not modify the membership or privileges of these groups without understanding how they are used. Additionally, many Windows features or 3rd party applications installed on the system may create additional groups. The following table lists some of the default groups used on Windows systems: Group Name Capabilities Administrators Members of the Administrators group have complete and unrestricted access to the computer, including every system right. The Administrator user account and any other account designated as a "computer administrator" is a member of this group. Backup Operators Members of the Backup Operators group can back up and restore files (regardless of permissions), log on locally, and shut down the system. Members of this group cannot change security settings. Power Users Modern versions of Windows no longer use the Power Users group, although it still exists for backwards compatibility. This group was originally used in Windows XP and earlier. Its members could: Create user accounts Modify or delete accounts they created Create local groups Modify group membership for groups they created Modify group membership for the Power Users, Users, and Guests groups Change the system date and time Install applications
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Power Users were not allowed to:
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