This policy setting determines which users can interactively log on to computers in your environment. Logons that are initiated by pressing the CTRL+ALT+DEL key sequence on the client computer keyboard require this user right. Users who attempt to log on through Terminal Services or IIS also require this user right. The Guest account is assigned this user right by default. Although this account is disabled by default, Microsoft recommends that you enable this setting through Group Policy. However, this user right should generally be restricted to the Administrators and Users groups. Assign this user right to the Backup Operators group if your organization requires that they have this capability. When configuring a user right in the SCM enter a comma delimited list of accounts. Accounts can be either local or located in Active Directory, they can be groups, users, or computers. Vulnerability: Any account with the Allow log on locally user right can log on at the console of the computer. If you do not restrict this user right to legitimate users who need to be able to log on to the console of the computer, unauthorized users could download and run malicious software to elevate their privileges. Counter Measure: For domain controllers, assign the Allow log on locally user right only to the Administrators group. For other server roles, you may choose to add Backup Operators as well as Administrators. For end-user computers you should also assign this right to the Users group. Alternatively, you can assign groups such as Account Operators, Server Operators, and Guests to the Deny Log on Locally user right. Potential Impact: If you remove these default groups, you could limit the abilities of users who are assigned to specific administrative roles in your environment. If you have installed optional components such as ASP.NET or Internet Information Services, you may need to assign Allow log on locally user right to additional accounts that are required by those components. For example, IIS 6 requires that this user right be assigned to the IUSR_<ComputerName> account for certain features; see "Default permissions and user rights for IIS 6.0" for more information: http://support.microsoft.com/?id=812614. You should confirm that delegated activities will not be adversely affected by any changes that you make to the Allow log on locally user rights assignments. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\User Rights Assignment\Allow log on locally (2) REG: NO INFO