To run an "executeable" file (one with a ".bat", a ".com", or
a ".exe" extension, you must be in the directory where the file is, OR have a path
statement that points to the directory. Learn what the "path" means.
This is usually caused by entering the drive letter to a drive
that doesn't exist as far as DOS is concerned. You may have a CD-ROM or
other device on the machine, but if you have not loaded its driver in the
"config.sys", the system will not know it exists.
This message may be caused by some disk other than
the "MS-DOS Setup Disk #1" being in the drive at boot time.
All the above errors occur at boot time. The causes are normally
a problem with the boot sector - either on the floppy or hard drive.
Some of the problems you see with MS-DOS, or other versions of DOS
are:
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Trouble-Shooting PC's