I have a p4 system with gigabyte motherboard , 1 Ghz of ram 2 harddisks and a dvdrom and a cdrom. The problem is when I insert a cdrom into the dvdrom sometimes it causes the system to hang and the only way I can get the system to respond again is to reboot. The problem is intermittent so it is hard to pin point the cause. I have loaded the latest firmware for the dvd and I have the latest SP for winxp also the latest bios for the motherboard. I will try unloading the antivirus and recorder software when I get home to see if that makes a difference.