I have been trying to setup aan ASUS motherboard model #A7V133 with an AMD 1 ghz processor. It has 256 megs of SDRAM and an 80 gig Maxtor hd. A Lite-On CD-Rw and a Sony DVD Player. My problem is that all of a sudden when I boot, I get sent to the CMOS and the message “System intruded,chassis opened. Check system.” pops up. How in the world do I get rid of this so that I can set up the machine?