Wint, I think you're on to something. I followed the directions in your link. I have two primaries and two secondaries, I hope because of my hardware, it's supposed to be like that.
Both of the Primary IDE channels are fine, according to those directions. One of the Secondary IDEs is also fine, but the second one reads "Transfer mode: PIO Only" and "Current Transfer Mode: PIO Mode."
I followed the instructions in Wint's link and rebooted. No dice. Then I tried uninstalling both Secondary IDEs (following the link instructions) No dice x2. Then uninstalled all four IDE entries, both primaries and both secondaries. Nothing.
But, on the plus side (?) every time I'd fiddled with the secondary IDE that was set in PIO mode, then restarted, windows would alert me that it found a disk drive before going through and reinstalling the secondary IDE.
Any Ideas?