It was not composed of CPU machine instructions, but of lower-level microcode involved in the implementation of machine instructions.
It existed on the boundary between hardware and software; thus the name "firmware".
However, unlike most modern operating systems, firmware rarely has a well-evolved automatic mechanism of updating itself to fix any functionality issues detected after shipping the unit.
The BIOS may be "manually" updated by a user, using a small utility program.
The Apollo guidance computer had firmware consisting of a specially manufactured core memory plane, called "core rope memory", where data were stored by physically threading wires through (1) or around (0) the core storing each data bit.But as you can see in our case the key problem is Imaging Engine.dll, and it has nothing to do with Nero or video codec packs from those links above.