Firmware for an all-in-one PC built on the MS-AC181 board, described as having a fixed Management Engine region. The RAR archive is 6.08 MB. The MS- prefix is the pattern MSI uses for its board numbers. An image with a repaired ME region is used when the system boots slowly, shuts down after a set time or reports ME errors after a bad flash. Write it to the SPI chip with a programmer only after reading and saving the original, and verify that the file size matches the flash capacity.
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 →