I am in the process of putting together a new P4 system. I temporarily installed Win98SE (because it was handy and I was too lazy to find my XP disk) just to test the primary disk (WD 80GB), and I temporarily put two other formatted, known good hard disks (with data on them) on the system (after verifying that everything else worked). After installing the disks, the BIOS verifies that the disks are present, the Windows device manager verifies that the disks are present and functioning properly -- but no disk icons other than the primary C drive and D (cd rom) are present under "My Computer." The system is acting as if the disks are unformatted, yet putting the disks in another Win98SE system verifies that the disks are indeed good. Any hints? I realize that this is a dead OS, but my curiosity is piqued -- I also manage a couple of labs for a music school and have not run into this problem before.