Unlocked BIOS firmware for a Lenovo board marked VIUX1, motherboard NM-A091 revision 1.0. The NM-xxxx pattern belongs to LCFC, Lenovo's own design and manufacturing arm. The unlock tag usually means the dump has a password or similar lock removed, though the name does not say exactly what was changed. At about 11 MB the archive may hold more than one image, so unpack it and compare each file size with your SPI chip. Back up the original chip before flashing, and confirm the board revision printed on the PCB.
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 →