stolen from a post on the focus-ms mailing list

If you press CTRL+ALT+DEL on Windows 2000, you will get 6 options, it means

nothing if you disable the feature of "cancel", "log off", and "shutdown".

For the rest of three, you can create the following keys under

HKey_Current_User\Software\Microsoft\Windows\CurrentVersion\Policies\System

By default, "System" is not there. You will need to create one if you don't

have it. Then add the keys and assign the value as the following.

For Lock Workstation, add a DWORD key "DisableLockWorkstation", assign 0 for

enable lock workstation and 1 for disable.

For Change Password, add a DWORD key "DisableChangePassword", assign 0 for

enable change password and 1 for disable.

For Task Manager, add a DWORD key "DisableTaskMgr", assign 0 for enable Task

Manager, and 1 for disable.