October 5, 2005
Task Manager has been disabled by your administrator
I'm guessing a piece of spyware did this to disallow terminating of their task.
Here's how to re-enable the ctrl-alt-delete sequence:
Go to this key using regedit:
HKCU \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies\ System
Set the DisableTaskMgr key to 0 and that will re-enable it.
More methods here:
http://windowsxp.mvps.org/Taskmanager_error.htm