We recently had our old computer upgraded from Windows 98 to Windows 2000 Pro. We then had trouble saving to drive "A" from a DOS program. (Disk is write protected - even though the tab was in the unlock position). We got a new "A" drive. Same Problem. We got a new computer, complete with a new "A" drive and motherboard. Same problem. We had our computer guy here to test ANOTHER floppy drive. Same Problem. We've used 5 or 6 brands of disks, new and used, 1.44 mb and 2.0 mb, and have fully reformatted all disks on the computer we're trying to use. No luck. We've switched cables between computers and the cables are working fine (on the other computers). We've checked the BIOS and the CMOS settings. They are all correct. THEN we found out that the only other computer in the company that has been switched from Win 98 to 2000 so far is having all of the same problems. Our software vendor swears it's not a software issue. The only time we CAN get the computer to write to the "A" drive (on either problem computer) is when we flip the switch on the disks to the locked position, then back to the unlocked position, and retry. Are we missing something? Can anyone help?