BIOS firmware for the Acer Z1401 all-in-one or compact model, tied to the board code MBPRNCBT44-T820 given in the name. The 3.13 MB RAR contains an image for rewriting the SPI flash on boards that fail to start after corruption. Compare the board number on your PCB carefully, since similar Acer codes such as MBPNCBT414 exist and are not interchangeable. Read and keep a copy of the existing chip with a programmer, and verify that the file size fits the chip before writing.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →