If the computers are part of an Active Directory domain then you have a
couple options such as using Restricted Groups or Group Policy startup
script to add a domain user account to the local administrators group of any
domain computer to allow access to logon as a local administrator. The
domain admins group by default should be in the local administrators group
of all domain computers but I don't recommend that a domain admin ever logon
to a workstation domain computer with his credentials unless the computer is
known to be 100 percent secure which is unlikely in a place like a library.
FYI for XP SP2 computer the Shared Computer Toolkit makes it easy to
lockdown computers in public places that are not part on an Active Directory
domain. See the link below if interested. --- Steve
http://www.microsoft.com/windowsxp/sharedaccess/default.mspx --- Shared
Computer Toolkit for XP SP2