Lenovo U41-70 BIOS image, project LT41, motherboard 14217, with 1M in the name probably marking the board variant or revision. The 14217 numbering follows the pattern Wistron uses for Lenovo boards. The RAR is meant for restoring firmware by writing the SPI flash with an external programmer. Before flashing, compare the board number on the PCB, save the original chip contents as a backup, and make sure the extracted image is the same size as the flash chip.
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 →