I HAVE A DIGTAL RESEARCH TECH 36X UDMA CDROM DRIVE. IF I ACTIVATE UDMA IN THE SETTINGS FOR THE CDROM DRIVE AND REBOOT, IT LOCKS MY SYSTEM. THE ONLY WAY I CAN BOOT IS TO PHYSICALLY DISCONECT THE CDROM AND REBOOT OR REINSTALL WINDOWS 98. MY COMPUTER IS A CYBERMAX K-6 200MMX WITH 98MEGS OF SDRAM. THE UDMA SETTING WORKS FINE ON MY TWO IBM HARD DRIVES. THE CDROM FUNTIONS IF I DO NOT ACTIVATE UDMA SWITCH IN THE SETTINGS FOR THE CDROM DRIVE. ANY IDEAS WILL BE APPRECIATED ON HOW TO ACTIVATE THE UDMA FOR FULL PERFORMANCE.