I have a Biostar M7VIT Bravo with KT400A chipset. The problem is that after I install Windows XP on the computer and try to copy something from one hard drive to another, Windows automatically sets my hard drive to PIO Mode 4. I've tried different versions of Via Hyperion but the problem still persists. I've changed my UATA cable but the same prob. What's more interesting is that under Windows 98SE everything goes fine. Have any ideas ? Versions of Hyperion tried 449p,451,453&455