Ok, I'm not a hardware rookie but this has me stumped. I have two 3.5 floppy drives. I started getting floppy errors on boot up. I changed cables many times and even changed floppies. Finally got the drives to work in Win 95 only. Still won't work in DOS but I don't get any errors on bootup. They will work in a DOS box in Win 95. I replaced the motherboard with one exactly the same and had the same problems. I then replaced it with a different motherboard and that solved the problem but I got mouse problems and lockups like crazy. I put the old motherboard back in and got the old problems back. Does anyone have any ideas?