NEC Express5800 User Manual page 321

If the creation of the OEM-Disk for Windows failed, the following message will be

displayed.
Confirm the message, and then try the solution described in the "Cause".
Error message
The format went wrong. It is write-protected or
the floppy disk may be damaged.
Please check a floppy disk and perform
creation of OEM-Disk again.
Failed in the deletion of the file. Please confirm
whether the media is not write-protected state
or not.
Troubleshooting 8-43
Cause
The Flash FDD or the floppy disk
is write-protected.
Cancel write-protected state.
If you have already cancelled
write-protected state, connect the
USB floppy disk drive again.