At home I have 2 floppy disks that my computer with windows 2000 cannot read. It says they are not formatted. These disks were previously used with windows 98, and possibly DOS before that. They still can be read with windows 98 on another machine. At my work place I use computers with windows 2000 and windows XP. The XP machines cannot read the older floppies, but the 2000 machines can. Also the XP machines find a windows 95 installation CDR to be blank, but the 2000 ones can read it fine. An engineer in another department says that his XP machines can read DOS floppies just fine. I would appreciate any explanation anyone has as to what is going on.