When I hit CTRL ALT DEL the task manager doesn't come up. However, this only happens when using either the left ALT, left CTRL, or both. If I use both right CTRL and right ALT, the task manager does come up. Either DEL and numpad DEL work with the right CTRL and ALT. In addition, CTRL SHIFT ESC also brings up the task manager, whether right CTRL SHIFT or left CTRL SHIFT (or a combination right and left) are used. Also, if I right click on the taskbar and choose "Task Manager", it comes up fine. Did I somehow disable the left hand CTRL ALT DEL combination? If so, how can I restore that functionality? I am running Windows XP SP2. Thank you!