I have an AMD Duron 600 on an Asus A7v. THere has been no overclocking b/c I did not build this for a power user. But when I try to play a dvd, my system locks up. I have an ATI xpert 2000, which should have hardware dvd decoding. I have bios 1004 on my motherboard, and the newest ATI drivers but no go. Anyone have any ideas? Thanks.