I've tried everything I can think of. In the Device Manager, it says "Windows successfully loaded the device driver for this hardware but cannot find the hardware device. (Code 41)" Which is funny, because in POST, it finds the hardware juuuuuust fine.I've tried swapping IDE channels. I've tried swapping slave and master on each channel. I've tried different CD ROMs in the machine (to no avail) and tried the CD ROM in question in other machines. I've tried swapping cables. I've tried unplugging and uninstalling hardware. The *only* thing I can think of is there's a hardware conflict with the on-board USB. IRQ 18 is shared by *both* IDE channels, plus one of the USB controllers.Anything else I can look at? The Event Log tells me nothing, also. No errors. Thanks!