Not sure if this is the right thread for this, but if not let me know. I have An Asrock dual sata 939 MOBO, with a opteron 165 dual core processor 1.8ghz, an AGP 7800gs vid card, and 2 gig ddr ram. I used to have intel p4 3.2 ghz, same vid card, same ram and it all worked just fine, even when using the same codec pack im trying to install now. windows media player will not play AVI files. says it cant download the codec, so when i install the very same codec i used on my previous machine, and try to play it again, it seems to lock up. the mouse will still move, task manager wont come up, nothing i click on does anything, and acording to my g15 keyboard, both cores of my processor are running around 40-60 percent. Ive let it sit there for a while, but it never recovers, and the screen will flash to black for a second, then come back, it will do this a few times. I have to press the reset button to restart. and every other program that i have tried so far seems to work fine, but it will not play avi files which played just fine on my previous machine. so nothing is wrong with the avi files, i have the latest vid drivers which i also had on my previous machine. any thoughts or ideas? This is driving me nuts!