This error can be caused by one or more of the below
possibilities.
Verify that no floppy diskette or CD is currently in the
computer. If a diskette or CD is in the computer that is not
bootable your computer may attempt to boot from that diskette or CD
causing this error message.
Additional information and help with getting into BIOS or CMOS
setup can be found on
here : http://www.computerhope.com/issues/ch000192.htm
It is possible that command.com or another bootable file may be
missing from the hard disk drive. Follow the below steps to
possible resolve your issue.
Windows 2000 and Windows XP users
If you have attempted all above suggestions and you are still
encountering the same issues, verify the connections are properly
connected to the computer if the hard drive was recently installed
or the computer was moved.
Unfortunately, if all connections are setup properly and all the
above recommendations have been attempted, it is likely that the
hard disk drive is bad and it will need to be replaced.