The description below is from the book DOS the Easy Way by Everett Murdock Ph.D.
CLICK HERE for information about downloading the book.
Type: Internal (5.0 and later)
LOADFIX [d:][path]filename [parameters]
Purpose: Ensures that a program is loaded above the first 64K of
conventional memory, and runs the program (new with DOS Version 6).
Tells DOS to load the specified program into the first 64K of
memory. If a Packed file corrupt message is displayed, use the LOADFIX
to ensure that the program you are trying to run is loaded above the
of conventional memory.
To load a program named LETTER1 (in the LETTERS directory on drive C)