Question

WHAT DOES CHASSIS INTRUSION ,FATAL ERROR ,SYSTEM HALTED MEAN???

Answer 1

Most likely it means that the chassis intrusion switch has been activated (someone opened the case), an error was generated, and your system was shut down.

Answer 2

A copy/paste answer:

chassis intrusion is a utility that the bios can use to tell you someone has opened the case. (intruded into the chassis)

alot of times i office buildings, the administrator will use that to alert them to the fact that someone had opened that pc.

once someone opened the case, a little button would pop out, and the chassis intrusion alert would show during next boot. (and some bios's force the boot to stall untill you go into the bios and reset the intrusion alarm.

answered by "Volt-Schwibe" at Tech Support Forum.
http://www.techsupportforum.com/forums/f10/what-is-chassis-intrusion-24135.html

:)