Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

THERE IS A PROBLEM WITH THE DISK.
 
There is a problem with a disk you are working
with. Before you continue:
 
■ Use the CHKDSK command to make sure the disk is
  formatted.
■ Make sure the disk is correctly inserted in the
  disk drive, and that the drive door is closed.
■ Remove the write-protect tab from the disk, if
  there is one.